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But $m N=M=$ Gram molecular mass Some physicists suspect that the second law of thermodynamics provides a clue. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. Is it against the second law thermodynamics ? SHOW SOLUTION What does universal gas constant signifies. and from eq. How much a) work is done and b) heat is transferred in this process? ... Answer to Question #150491 in Molecular Physics | Thermodynamics for Banda 2020-12-11T00:42:59-0500. After you attempt the test, click “Quiz-summary” at the end. ) What is the valve of work-done in a cyclic process ? Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. What is meant by reversible engine ? speed (c) of molecules of different gases shall be different. $\Rightarrow P \Delta V+C_{V} \Delta T=C_{P} \Delta T[\text { From equation }(2)]$ Q. A rapidly spinning paddle wheel raises the temperature of 200mL of water from 21 degrees Celsius to 25 degrees. Thermodynamics article. Top Questions. Since, can never be negative, therefore the value of absolute temperature T can never be negative. Further internal energy of an ideal gas depends on temperature only. MCQ On Thermodynamics. ... Introduction to Physics course • Please fill in feedback surveys! PART A. Thus, the mean kinetic energy of a molecule is directly proportional to the absolute temperature of the gas. Q. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. Straight line of the form : SHOW SOLUTION Q. Gas C is ideal, because PV is constant for this gas. Therefore pressure is halved, A Thermos bottle containing coffee is vigorously shaken. The slope of an isothermal or adiabatic curve is Thermodynamics is the study of the relations between heat, work, temperature, and energy. E. enthalpy, entropy, heat Two different gases have exactly the same temperature. Determine the heat transfer required . SHOW SOLUTION Why it is unique ? These important questions from thermodynamics class 11 physics will play significant role in clearing concepts of Physics. First law of thermodynamics : It is a statement of conservation of energy in thermodynamical process. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Quiz: Scientific Facts About Heating And Cooling. There are n molecules of gas in a box. SHOW SOLUTION $\frac{1}{3} M c^{2}=R T$ ……. Since, can never be negative, therefore the value of absolute temperature. (vi) $E \propto T$ Heat and Thermodynamics's Previous Year Questions with solutions of Physics from JEE Main subject wise and chapter wise with solutions Isothermal process : That thermal process in which the pressure and volume of the system (gas) change but temperature remains constant is called isothermal process. strategies to Crack Exam in limited time period. At $T=0$ Is thermodynamics physics? Answer : The third … It has four fundamental laws. Further internal energy of an ideal gas depends on temperature only. Q. (iii) What is the change in temperature of the gas? $\left(\frac{d P}{d V}\right)_{A}=\gamma\left(-\frac{P}{V}\right)=\gamma\left(\frac{d P}{d V}\right)_{I}$ Q. NEET UG, JEE Main Physics Question Papers | Topic: Thermodynamics, Question Type: MCQs, Test: 01 speed (c) of molecules of different gases shall be different. • Good luck in the upcoming exams! Why temperature beyond $1200^{\circ} \mathrm{C}$ cannot be measured accurately by a platinum resistance thermometer? A great deal of effort, time, and money has been spent in the quest for the so-called perpetual-motion machine, which is defined as a hypothetical machine that operates or produces useful work indefinitely and/or a hypothetical machine that produces more work or energy than it consumes. That thermal process in which pressure, volume and temperature of the system change but there is no exchange of heat between the system and the surroundings, is called an adiabatic process. This is known as Mayor’s equation. What is the pressure inside the container? How is the mean kinetic energy of a gas related to its temperature? It is the temperature at which three phases of water namely ice, water and water vapour are equally stable and exist simultaneously. This process is achieved Universal gas constant signifies the work done by (or on) a gas per mole per kelvin. 1.. A diesel engine uses 54.5 kg of fuel oil per hour of calorific value 45 MJ/kg. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. This question bank is designed by expert faculties keeping NCERT in mind and the questions are updated with respect to upcoming Board exams. In summer, when the valve of a bicycle tube is opened, the escaping air becomes cold. Solution:-The correct option is (D). No, it is not against the second law. SHOW SOLUTION If not, why have feel cold ? SHOW SOLUTION It is possible to convert internal energy into work ? According to it “when some quantity of heat (. How is the mean kinetic energy of a gas related to its temperature? (iv) Do the intermediate state the system (before setting to final equilibrium state) be on its P-V-T surface ? Further internal energy of an ideal gas depends on temperature only. Due to which the molecules of gas get more space to move about. Which gas will have greater temperature rise? Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. eSaral provides you complete edge to prepare for Board and Competitive Exams like JEE, NEET, BITSAT, etc. When the first law of thermodynamics, Q = ΔU + W, is applied to an ideal gas that is taken through an isothermal process, A gas is expanded to twice its original volume with no change in its temperature. There are n molecules of gas in a box. All Topics Introduction to Thermodynamics Zeroth Law of Thermodynamics Heat, Internal Energy and Work First Law of Thermodynamics Specific Heat Capacity Thermodynamic State Variables and Equation of State Thermodynamic Processes Engines and Cycles Second Law of Thermodynamics Reversible and Irreversible Process, Carnot Engine Find Everything You need The limitations are : What does universal gas constant signifies. $(273.16 K)$ at one single pressure of about $0.46 \mathrm{cm}$. In physics, when we study thermodynamics, we say that we cannot find the work done in Irreversible processes, because in such processes, the different variables of gas are not defined. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. Following is the diagram of the thermodynamic process. CBSE Important Questions Class 11 Physics Chapter 11 thermodynamics. State and explain first law of thermodynamics. Stuck on a tricky physics problem? What do you know about the scientific study? Download India's Leading JEE | NEET | Class 9,10 Exam preparation app, Important Questions from Thermodynamics Class 11 Physics. Show that an adiabatic curve is always steeper than an isothermal curve. They move in all directions with different speeds. SHOW SOLUTION Practice: Thermodynamics questions. No, because carnot engine is an ideal heat engine, whose conditions are not realised in practice. Zeroth law of thermodynamics. For operation of a heat engine we require a sink at temperature lower than the source and of sufficiently high thermal capacity, which is not possible in sea. View all Physics important questions for all the chapters. $\frac{2}{3} \times \frac{1}{2} M c^{2}=R T$, $\Rightarrow \frac{1}{2} M c^{2}=\frac{3}{2} R T$, $\frac{1}{2} m N c^{2}=\frac{3}{2} R T$ or $\frac{1}{2} m \bar{c}^{2}=\frac{3}{2} \frac{R}{N} T$, or $\frac{1}{2} m c^{2}=\frac{3}{2} K T$ or $E=\frac{3}{2} K T$ ………(vi), where $E=\frac{1}{2} m c^{2}=$ Mean kinetic energy of the, molecule and $=\frac{R}{N}=$ constant $k$ is called. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. Question 2 . Also Access CBSE Class 12 Physics Sample Papers First law of thermodynamics. A great deal of effort, time, and money has been spent in the quest for the so-called perpetual-motion machine, which is defined as a hypothetical machine that operates or produces useful work indefinitely and/or a hypothetical machine that produces more work or energy than it consumes. slope of adiabatic curve, What is thermodynamics? What is the ice-point on kelvin scale? Thermodynamics is a branch of science which primarily focuses on the relations between heat and various other forms of energy, such as mechanical, chemical or electrical energy, and therefore the relationships between all forms of energy. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. Ans: d. 2. As a result of which less molecules will collide with the wall of cylinder per second and hence less momentum is transferred to the wall per second. 8. Students may come across some of these questions in the exam. SHOW SOLUTION Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. SHOW SOLUTION which is very easy to understand and improve your skill. $\frac{1}{2} m c^{2} \propto T$ If you skip these chapters, you are going to be at a great loss. SHOW SOLUTION If an electric fan be switched in a closed room, will the air of the room be cooled ? Physics Class 11 Important Questions are very helpful to score high marks in board exams. $\Delta U=0$. On the kinetic energy of the gas? A Thermos bottle containing coffee is vigorously shaken. Suppose a polyatomic gas molecule has n degrees of freedom. State The Third Law Of Thermodynamics. of thermodynamics? It is possible to convert internal energy into work ? If the temperature of body increases by $1^{\circ} \mathrm{C},$ what will be change in temperature on kelvin scale? ds=dQ/T Entropy is inversely proportional to the temperature so, as temp. Thermodynamics, Physics MCQ (NEET, JEE Main) – Test 1. speed. The entire system is thermally insulated. But as the different gases may have molecules of different masses, the r.m.s. Although the root mean square speed of gas molecules is of the order of the speed of sound in that gas, yet on opening a bottle of ammonia in one corner of a room its smell takes time in reaching the other corner. Q. The graph shows the variation of the product PV with respect to the pressure (P) of given masses of three gases A, B and C. The temperature is kept constant, state with proper arguments which of these gases is ideal. Physics Thermodynamics MCQ for NEET Thermodynamics is a branch of Physics that helps in understanding heat and temperature and their relation with work, energy, radiation, and other properties of matter. Take the Quiz and improve your overall Physics. $\begin{array}{ll}{\text { As volume remains constant, }} \\ {d V=0} & {\therefore \Delta W=P \Delta V=0} \\ {\text { According to first law of thermodynamics, }} \\ {\Delta Q=\Delta U+\Delta W} \\ {\Rightarrow \Delta U=C_{V} \Delta T}\end{array}$ If three molecules have speed u1, u2, u3 what will be their average speed and r.m.s. (ii) Specific heat at constant pressure $\left(\mathrm{C}_{P}\right):$ It is the amount of heat required to raise the temperature of unit mass of gas by $1^{\circ} \mathrm{C}$ at constant pressure. This process is. SHOW SOLUTION Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. (v), $\bar{c}^{2}=0$. Considering coffee as a system, (d) Now, as internal energy of system depends upon its temperature. But r.m.s. Q. Although the root mean square speed of gas molecules is of the order of the speed of sound in that gas, yet on opening a bottle of ammonia in one corner of a room its smell takes time in reaching the other corner. Expert's answer. Where $m=$ Mass of one molecule, $N=$ Number of molecules present in volume $V$ and$\bar{c}^{2}=$ Meansquare velocity If $V$ is the volume of $1 g m$ molecule $(1$ mole) of a gas. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. $\left(C_{P}-C_{V}\right) \Delta T=R \Delta T$ Q. column. (i) Specific heat at constant volume $\left(C_{V}\right):$ It is the amount of heat required to raise the temperature of unit mass of a gas by $1^{\circ} C$ at constant volume. With the help of AI we have made the learning Personalized, adaptive and accessible for each and every one. (2) In above relation is expressed for one gram of gas, then, $C_{P}-C_{V}=\frac{r}{J}$ The Laws of Thermodynamics have become some of the most important laws of all science. First law of thermodynamics problem solving. R Process – III (C) Isochoric. Which Harry Potter Hogwarts House Do You Belong To Quiz. Q. Practice: Thermodynamics questions. SHOW SOLUTION Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. ... Related Questions. Answers > Physics > Molecular Physics | Thermodynamics. This is the currently selected item. Lv 7. Zeroth law of thermodynamics. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. (b) the gas is compressed or allowed to expand very quickly. As they pass by a cook puts 6.60 g of helium contains one mole ( 6.0 x 10 atoms... Nonliving matter as heat by the gas returns to equilibrium states which lies on its P-V-T surface of different,. 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Called free expansion ) is rapid and random motion all Physics important questions on thermodynamics physics Class 11 questions. 2 - Thermodynamics very ordered rules of energy takes place and whether the system ) fixes on to temperature... Coefficient of expansion slightly less than that of source setting to final equilibrium state ) be on its surface... Short time interval, the gas performs of work to raise the lid, such that is warmed... Information about the direction in which change takes place \$ can not be controlled support! Chapter: the first law of Thermodynamics: it is possible to convert heat energy continuously work... The limitations of first law of Thermodynamics and heat for Class 11 Physics will significant! Energy of gas molecules depend: nature of the tube of the celsius scale to evaporation of sweat deals the... Interval, the gas fitted with a piston at a definite temperature and.... Page, here ordered rules of energy interactions, which the process ( free...