question_answer2) State the first law of thermodynamics.
question_answer3) How does the internal energy of an ideal gas differ from that of real gas?
question_answer4) Is the internal energy of a gas a function of pressure? Comment.
question_answer11) Cooling is produced when a gas at high pressure suddenly expands. Why?
question_answer12) When a gas is suddenly compressed, its temperature rises. Why?
question_answer13) If an inflated tyre bursts, the air escaping out is cooled, why?
question_answer17) Why does air pressure in a car tyre increase during driving?
question_answer21) Does the mass of a body change when it is heated or cooled?
question_answer22) When air of the atmosphere rises up, it cools. Why?
question_answer23) Is the equation \[\mathbf{PV=RT}\] valid for isothermal and adiabatic processes?
question_answer26) Can two isothermal curves intersect?
question_answer28) Can the work done during a cyclic process be zero?
question_answer29) How many specific heats does a gas possess?
question_answer32) A gas has two principal specific heats. Which one is greater and why?
question_answer34) Can specific heat of a gas be negative?
question_answer35) What is the specific heat of a gas in an isothermal process?
question_answer36) What is the specific heat of a gas in an adiabatic process?
question_answer42) What is difference between heat and work?
question_answer45) Why can a ship not use the internal energy of sea water to operate its engine?
question_answer50) Is the efficiency of a heat engine more in hilly areas than in the plains?
question_answer53) How a refrigerator can be used as a heat pump to heat a house in winter?
question_answer69) Can a Carnot engine be realised in practice?
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