Heat And Thermodynamics Ques 145
- 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
(1990, 2M)
(a) $\frac{2}{5}$
(b) $\frac{3}{5}$
(c) $\frac{3}{7}$
(d) $\frac{5}{7}$
Show Answer
Solution:
Formula:
- The desired fraction is
$f=\frac{\Delta U}{\Delta Q}=\frac{n C _V \Delta T}{n C _p \Delta T}=\frac{C _V}{C _p}=\frac{1}{\gamma}$ or $f=\frac{5}{7} \quad\left(\right.$ as $\left.\gamma=\frac{7}{5}\right)$
BETA
