If Cp and Cv are the specific heats for a gas at constant pressure and at constant volume respectively, then the relation Cp-Cv=R is exact for? a) Ideal and real gases at all pressures b) Ideal gas at all pressures and real gas at a moderate pressure c) Ideal gas and nearly true for real gases at high pressure d) Ideal gas and nearly true for real gases at a moderate pressure

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If Cp and Cv are the specific heats for a gas at constant pressure and at constant volume respectively, then the relation Cp-Cv=R is exact for?

a) Ideal and real gases at all pressures

b) Ideal gas at all pressures and real gas at a moderate pressure

c) Ideal gas and nearly true for real gases at high pressure

d) Ideal gas and nearly true for real gases at a moderate pressure

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