What is the correct answer?


The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 - T2)/T1. The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2 is given by

A. T1/(T1-T2)

B. T2/(T1-T2)

C. T1/T2

D. T2/R1

Correct Answer :

A. T1/(T1-T2)

Related Questions

In case of steady flow compression polytropic process (PVn = constant),… Enthalpy 'H' is defined as Internal energy is equal to the heat absorbed in case of a/an __________… Fundamental principle of refrigeration is based on the __________ law… The equation DU = Tds - PdV is applicable to infinitesimal changes occuring… What is the value of Joule-Thomson co-efficient for an ideal gas? In an ideal solution, the activity of a component equals its Co-efficient of Performance (COP) of a refrigerator is the ratio of the At constant temperature and pressure, for one mole of a pure substance,… Sublimation temperature of dry ice (solid CO2) is __________ °C. Choose the condition that must be specified in order to liquify CO2 (triple… Entropy, which is a measure of the disorder of a system, is: Pick out the wrong statement. Rotary lime kiln is an example of a/an __________ system. For an incompressible fluid, the __________ is a function of both pressure… Gibbs-Duhem equation There is a change in __________ during the phase transition. Entropy change of mixing two liquid substances depends upon the For a constant volume process __________ by the system is used only to… Any substance above its critical temperature exists as The effect of changing the evaporator temperature on COP as compared to… The value of Cp & Cv respectively for monatomic gases in Kcal/kg Mole.°K… Entropy is a measure of the __________ of a system. A gas performs the maximum work, when it expands In polytropic process (PVn = constant), if n = 1; it means a/an __________… The necessary condition for phase equilibrium in a multiphase system of… For a stable phase at constant pressure and temperature, the fugacity… What is the value of ln y (where y = activity co-efficient) for ideal… In case of the decomposition of hydroiodic acid (2HI H2 + I2), addition… For a cyclic process, a fixed ratio between heat and work