Question

When an ideal diatomic gas is heated at constant pressure the fraction of the heat energy supplied which increases the internal energy of the gas is –

• A. $\frac{2}{5}$
• B. $\frac{3}{5}$
• C. $\frac{3}{7}$
• D. $\frac{5}{7}$

Answer 1

Answer: (D)

$\frac{5}{7}$

Answer 2

$\frac{dU}{\Delta Q} = \frac{\mu C_{v}dT}{\mu C_{p}dT} = \frac{C_{v}}{C_{p}} = \frac{1}{\gamma}$