Answer :
At constant pressure, the ratio between the volume expansion of a mole of gas with a high Cp to that of a mole of gas with a low Cp for a given heat input is Less than 1.
How are Cp and Cv related to one another?
The molar heat capacity of a substance is expressed as Cp when the pressure is constant and as Cv when the volume is constant. These two parameters so describe the molar heat capacity at various pressures and temperatures.
Constant Volume and Pressure
The first law of thermodynamics states that heat delivered to a system can either be converted into internal energy or used to generate work in the environment. An isochoric process is one in which the volume is constant, whereas an isobaric process is one in which a gas interacts with its surroundings at constant pressure.
Constant Pressure
An isobaric process takes place at constant pressure. Since the pressure is constant and the work is denoted by PV, the force applied is constant.
If gas is to expand at an isobaric pressure at a certain pressure, heat must be introduced into the system at a specific rate. For instance, a movable piston in a cylinder keeps the pressure inside the cylinder constant at atmospheric pressure despite the fact that it is isolated from the atmosphere. In other words, a moveable barrier serves as a dynamic link between the system and a constant-pressure reservoir.
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