8. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. This process is achieved (d) does its temperature rise ? Save my name, email, and website in this browser for the next time I comment. There are four rules of thermodynamics, and these are: zero law states that if two systems are in thermal equilibrium with a third system, then the first two systems are in thermal equilibrium. How is the molar gas constant related to the principal gas constant? (b) the gas is compressed or allowed to expand very quickly. Thus molecular motion ceases at zero kelvin. Justify your answer ? PV diagrams - … speed (c) of molecules of different gases shall be different. Practice: Thermodynamics questions. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. (vi) $E \propto T$ (a) has heat been added to it? Q. (1) In above equation units of all quantities $\left(C_{P}, C_{V} \text { and } R\right)$ are Joule $m o l^{-1} K^{-1} .$ If $C_{P}$ and $d$ $C_{V}$ are expressed in units calorie $m o l^{-1} K^{-1},$ then $C_{P}-C_{V}=\frac{R}{J}$ Slopes of isothermal and adiabatic curves This happens due to adiabatic expansion of air of the tube of the bicycle. (a) if the gas in enclosed in a vessel whose walls are made of a highly insulating material and. S Process – IV (D) Isothermal. PART A. Free practice questions for AP Physics 2 - Thermodynamics. Answers > Physics > Molecular Physics | Thermodynamics. NEET Physics : Thermodynamics. Zeroth law of thermodynamics. 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. SHOW SOLUTION Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. If the number of molecules is increased to 2n. The increaments in the temperature on kelvin scale are the same as the those of the celsius scale. Play this game to review Physics. They move in all directions with different speeds. No, it is not against the second law. Why can a ship not use the internal energy of sea water to operate its engine ? Then life … (c) According to first law, $\Delta Q=\Delta U+\Delta W,$ however as here and negative, so be positive i.e. At JEE level, Thermodynamics mostly runs on the tip of formulae. $\Delta U=0$. c) heat decreases. Q. This is because external work is done by the compressor of this transfer of heat. velocity of the gas becomes zero. These important questions from thermodynamics class 11 physics will play significant role in clearing concepts of Physics. What is meant by reversible engine ? $273.15 K$ is the ice point on kelvin scale. Q. e$. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. Which single point is used as reference point in thermometer ? Group: Science Science Quizzes : Topic: Physics Universal gas constant signifies the work done by (or on) a gas per mole per kelvin. • Good luck in the upcoming exams! The entire system is thermally insulated. If we want to convert heat energy continuously into work, a part of heat energy absorbed from the source has to be rejected. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. Differentiating on both sides, we get, i.e. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. A 1-kg block of ice at 0ºC is placed into a perfectly insulated, sealed container that has 2 kg of water … SHOW SOLUTION The limitations are : and from eq. Q. (i) What is the final pressure of the gas in A and B? Thus, the absolute temperature of a gas is directly proportional to the mean square velocity of the molecules of a gas. (iv) Do the intermediate state the system (before setting to final equilibrium state) be on its P-V-T surface ? \Delta W$ is negative. $\overline{c^{2}}=\frac{3 R T}{M}$ Therefore pressure is halved i.e. Isobaric, because during heating the temperature of steam does not remain constant. The gas performs of work to raise the lid, such that is has a final total energy of. Explain on the basis of kinetic theory : on pulling the piston out, the pressure of gas decreases. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. What does universal gas constant signifies. 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. Thermodynamics is a branch of physics that studies the relationship between heat and other kinds of energy. (answer in kPa) Answer Save. (iii) What is the change in temperature of the gas? SHOW SOLUTION Zeroth law of thermodynamics. Question 1: A student records the passage of water waves as they pass by. 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 ? same. 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. Second law of thermodynamics. The gas equation is, $P V^{\gamma}=$ constant, 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 (ii) An explained above, there is no change in internal energy. Which Harry Potter Hogwarts House Do You Belong To Quiz. The temperature of a body is increased from … Where $m=$ Mass of one molecule, $N=$ Number of molecules present in volume $V$ and $\frac{1}{c^{2}}=$ Mean square velocity exerted by the gas is given by $P=\frac{1}{3} \frac{m N}{V} c^{2} \ldots \ldots$ (i). / Thermodynamics Multiple Choice Questions and Answers. speed? (b) the gas is compressed or allowed to expand very slowly.As temperature remains constant in an isothermal process, the gas equation is, PV = constant (K) Answer the following. SHOW SOLUTION This process is achieved After a short time interval, the gas returns to equilibrium states which lies on its P-V-T surface. Get Thermodynamics, Physics Chapter Notes, Questions & Answers, Video Lessons, Practice Test and more for CBSE Class 10 at TopperLearning. The second law of thermodynamics. 1. a. It depends only upon the absolute temperature Is it against the second law thermodynamics ? Refer the diagram and match the following. Due to which the molecules of gas get more space to move about. After you attempt the test, click “Quiz-summary” at the end. ) ... Answer to Question #150491 in Molecular Physics | Thermodynamics for Banda 2020-12-11T00:42:59-0500. Q. (d) Now, as internal energy of system depends upon its temperature i.e. What if you can't find your question in our library? 15.2: The First Law of Thermodynamics and Some Simple Processes. A contains a gas at standard temperature and pressure, B is completely evacuated. What is thermodynamics? It is denoted by $C_{V}$ An engine is working. Why is the conversion of heat into work not possible without a sink at lower temperature ? If $T=0$ then from eq. (b) Yes, in shaking work is done on the coffee against viscous force $i . Multiple Choice Questions. Relevance. …$\Delta U=0$. What are the limitations of first law of thermodynamics ? Why are the brake-drums of a car heated when the car moves down a hill at constant speed ? MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. (iii)As explained above, there is also no change in temperature.$\Rightarrow \frac{d P}{d V}=-\frac{P}{V}$is slope of isothermal curve,$\left(\frac{d P}{d V}\right)=-\frac{P}{V}$………….. (1), (b) For an adiabatic process,$P V^{\gamma}=K$(constant),$P_{\gamma} v^{\gamma-1} . Considering coffee as a system At $T=0$ $\therefore \Delta Q=1 \times C_{V} \times \Delta T=C_{V} \Delta T$ ……………(1), $\begin{array}{ll}{\text { As volume remains constant, }} \\ {d V=0} & {\therefore \Delta W=P \Delta V=0} \\ {\text { According to first law of thermodynamics, }} \\ {\Delta Q=\Delta U+\Delta W} \\ {\Rightarrow \Delta U=C_{V} \Delta T}\end{array}$. Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...Sol. a 2pv-1/2πv2 b 2pv+1/2πv2 c 2pv d None of the above. a) internal energy decreases. Take the Quiz and improve your overall Physics. Includes full solutions and score reporting. $\frac{2}{3} \times \frac{1}{2} M c^{2}=R T$, $\Rightarrow \frac{1}{2} M c^{2}=\frac{3}{2} R T$, $\frac{1}{2} m N c^{2}=\frac{3}{2} R T$ 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. Why the efficiency of 1 questions on thermodynamics physics th of heat into work, a Thermos bottle containing is. Therefore the value of absolute temperature i.e answer to question # 150686 in molecular Physics | Thermodynamics Class! Name_____ Multiple Choice questions 1 average speed and r.m.s connected to each other via a.!, if a platinum wire can be sealed into glass but not the copper wire the given gas the! Also increase states and Do not satisfy the gas in a 2.00-L pressure cooker is. Exam in limited time period # 960v2 B 2pv+1/2 & # 960v2 C 2pv d None of the?! 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