The specific heat at constant pressure (C_P) | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) By definition,specific heat at constant volume $(C_V)$ is the heat required to raise the temperature of $1 	ext{ mole}$ of a gas by $1 	ext{ K}$

Vedclass · Accepted Answer

At constant pressure,work is done in expanding the gas.

Vedclass · Answer

(A) By definition,specific heat at constant volume $(C_V)$ is the heat required to raise the temperature of $1 	ext{ mole}$ of a gas by $1 	ext{ K}$ while keeping the volume constant. In this case,no external work is done $(W = 0)$,so all the heat supplied is used to increase the internal energy of the gas.However,at constant pressure $(C_P)$,when heat is supplied to the gas,it not only increases the internal energy but also performs external work $(W = P \Delta V)$ to expand the gas against the constant external pressure.According to the first law of thermodynamics,$\Delta Q = \Delta U + W$. Since $C_P$ requires additional energy to perform this expansion work,more heat must be supplied to achieve the same temperature rise compared to the constant volume process. Therefore,$C_P > C_V$.

The specific heat at constant pressure $(C_P)$ is greater than the specific heat at constant volume $(C_V)$ for the same gas because:

Similar Questions

For a gas,$\frac{R}{C_{V}} = 0.4$,where $R$ is the universal gas constant and $C_{V}$ is the molar specific heat at constant volume. The gas is made up of molecules which are

When heat is supplied to a diatomic gas,it expands at constant pressure. What fraction of the heat supplied is converted into internal energy?

Which one of the following is $NOT$ a correct expression for an ideal gas?
[$C_{P}=$ Molar specific heat of a gas at constant pressure,
$C_{V}=$ Molar specific heat of a gas at constant volume,
$\gamma=$ Ratio of two specific heats of a gas,$R=$ Universal gas constant]

When a monoatomic gas is heated at constant pressure,what fraction of the heat energy supplied is used to increase the internal energy?

The specific heat relation for an ideal gas is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module