SHOW SOLUTION Is it against the second law thermodynamics ? Work is a path function. (d) Now, as internal energy of system depends upon its temperature i.e. \Delta W$is negative. Let 1 mole of a gas is supplied$\Delta Q$amount of heat at constant volume so that the temperature of the gas rises by$\Delta T$. At what temperature does all molecular motions cease? (b) Yes, in shaking work is done on the coffee against viscous force$i . This is the reason due to which the lowest temperature on kelvin’s scale is assumed to be 0K. Q. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. But, since copper is more expansible than glass, the copper wire contracts more than the hole in the glass, hence the copper wire losens out. speed. The air will not be cooled, but will be heated because due to motion of the fan, the speed of air molecules will increase. CBSE Class 11-Physics: Thermodynamics Problem's: Questions Doorsteptutor material for CBSE is prepared by world's top subject experts: fully solved questions with step-by-step explanation - practice your way to success. $P d V+V d P=0$ PART A. Due to both these reasons, the pressure decreases. Q. 1. a. Why it is unique ? SE; b. ES; c. ES. Thus molecular motion ceases at zero kelvin. A rapidly spinning paddle wheel raises the temperature of 200mL of water from 21 degrees Celsius to 25 degrees. It takes 100 calories of heat from source and leaves 80 calories of heat to sink. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. MCQ quiz on Thermodynamics multiple choice questions and answers on Thermodynamics MCQ questions quiz on Thermodynamics objectives questions with answer test pdf. Therefore, $m N$will be gram molecular mass. Universal gas constant signifies the work done by (or on) a gas per mole per kelvin. (iv) Physics Important Questions Class 11 are given below. Explain on the basis of kinetic theory : on pulling the piston out, the pressure of gas decreases. (b) has work been done on it? … SHOW SOLUTION $1^{\circ} C=1 K$. SHOW SOLUTION Further internal energy of an ideal gas depends on temperature only. There are n molecules of gas in a box. After a short time interval, the gas returns to equilibrium states which lies on its P-V-T surface. I was watching Tenet and it made me think about some old questions I have. Obtain the relation between degree of freedom of a gas and ratio of two principal specific heats of the gas. S Process – IV (D) Isothermal. The Following Section consists of Thermodynamics Questions on Physics. What does universal gas constant signifies. Yes in heating or cooling, a body absorbs or loses energy. pressure will reduce to 0.5 atm. (c) According to first law, $\Delta Q=\Delta U+\Delta W,$ however as here and negative, so be positive i.e. Q. Relevance. There is a temperature known as Boyle’s temperature ( $\left.T_{\mathrm{B}}\right)$ for each real gas at which it behaves like an ideal gas. Considering coffee as a system, (d) Now, as internal energy of system depends upon its temperature. strategies to Crack Exam in limited time period. It means the gas C obeys Boyle’s law at all pressures. d P=0$Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. Hence, temperature of gas will remain constant. SHOW SOLUTION Explain on the basis of kinetic theory : on pulling the piston out, the pressure of gas decreases. Some of the energy goes into changing the phase of the liquid to gas. In fact, we feel cold due to evaporation of sweat. If three molecules have speed u1, u2, u3 what will be their average speed and r.m.s. Download India's Best Exam Preparation App. Specific heat and latent heat of fusion and vaporization. Mean kinetic energy is proportional to its absolute temperature. Note Q. Name the sink in case of steam engine ? But r.m.s. SHOW SOLUTION Slopes of isothermal and adiabatic curves Solution to question #150492. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. Thermodynamics is a field of science that deals with the quantitative relationships between energy sources, and the study of heat and work interconversion. Why does a gas get heated on compression ? Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. Physics. • Good luck in the upcoming exams! After you attempt the test, click “Quiz-summary” at the end. ) Practice: Thermodynamics questions. R = Mr. Q. The rejection of heat energy is possible only if there is a body having temperature less than that of source. molar gad constant R = 8.3 J mol-1 K-1 (2 Marks) b) The gas is compressed to volume of 0.020 m 3.The temperature of the gas is kept constant. Equal masses of monoatomic gas and diatomic gas at the same temperature are given equal quantities of heat. same. velocity of the gas becomes zero. SHOW SOLUTION Therefore pressure is halved i.e. Ans: d. 2. State and explain first law of thermodynamics. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. This is the reason due to which the lowest temperature on kelvin’s scale is assumed to be 0K. Why it is unique ? Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. (ii) What is the change in internal energy of the gas ? Relation between two principal specific heat of a gas : A gas has two specific heats ... Introduction to Physics course • Please fill in feedback surveys! SHOW SOLUTION Explain why the efficiency of reversible engine is maximum ? What is the valve of work-done in a cyclic process ? What does universal gas constant signifies. SHOW SOLUTION This is the relation between$\gamma$and n. Hence the value of for a polyatomic gas can be determined from degree of freedom n. Total energy associated with a gram molecule of the gas. (ii) An explained above, there is no change in internal energy. (i) Specific heat at constant volume$\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. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. speed (c) of molecules of different gases shall be different. At what temperature does all molecular motions cease? In this quiz, you will learn about these three laws. where$E=\frac{1}{2} m c^{2}=$Mean kinetic energy of the Distinguish between average speed and r.m.s. No, because gas does not behave like an ideal gas if$T>T_{B}$and$T