Solution:
Helium is a monoatomic gas ($C_v = \frac{3}{2}R$). The number of moles in $1 \text{ g}$ is $n = \frac{1}{4}$. The heat required is $Q = n C_v \Delta T = \frac{1}{4} \left(\frac{3}{2}R\right)(T_2 - T_1) = \frac{3}{8} N_A k_B (T_2 - T_1)$.
The amount of heat energy required to raise the temperature of $1 \text{ g}$ of Helium at NTP, from $T_1 \text{ K}$ to $T_2 \text{ K}$ is: (2013)
Leave a Reply