Question 731: Thermodynamics & KTG

Question

An ideal diatomic gas is heated at constant pressure. What is the fraction of total energy applied, which increases the internal energy for the gas?

Accepted Answer

To determine the fraction of total energy applied that increases the internal energy of an ideal diatomic gas heated at constant pressure, we use the relationship between heat energy and specific heat capacities. The fraction is given by:
$ \frac{\Delta U}{\Delta Q} = \frac{C_v}{C_P} = \frac{1}{\gamma} $
For a diatomic gas, the specific heat ratio $\gamma$ is $\frac{7}{5}$. Therefore, the fraction of energy used to increase the internal energy is:
$ \frac{\Delta U}{\Delta Q} = \frac{5}{7} $

Answer

$\frac{2}{5}$

Answer

$\frac{5}{7}$

Answer

$\frac{3}{7}$

Answer

$\frac{3}{5}$

Thermodynamics & KTG

An ideal diatomic gas is heated at constant pressure. What is the fraction of total energy applied, which increases the internal energy for the gas?

Choose the correct answer: