Question

A rigid container of negligible heat capacity contains one mole of an ideal gas. The temperature of the gas increases by 1° C if 3.0 cal of heat is added to it. The gas may be
(a) helium
(b) argon
(c) oxygen
(d) carbon dioxide

Answer 1

Explanation:

A rigid container of negligible heat capacity contains one mole of an ideal gas. The temperature of the gas increases by 1° C if 3.0 cal of heat is added to it. The gas may be

(a) helium

(b) argon✔️✔️

(c) oxygen

(d) carbon dioxide

Answer 2

As the temperature of the gas increases by 1° C when 3.0 cal of heat is added to it, the gas may be (a) helium or (b) argon.

Explanation:

• Here, the molar heat capacity is given by $C_{v}=12.54 \mathrm{J} \mathrm{JK}^{-1} \mathrm{mol}^{-1}$ as the heat supplied to a mole of gas to increase its temperature by one degree determines the molar heat capacity at fixed volume.
• From the above, the helium and argon gases are inert gases. This shows that they are mono atomic.