`5g` of a gas is contained in a rigid container and is heated from `15^@C to 25^@C` . Specific heat capacity of the gas at constant volume is `0.172 cal g ^(-1)^@C^(-1)` and the mechanical equivalent of heat is 4.2 J cal . Calculate the change in the internal energy of the gas.

Explanation

To calculate the change in the internal energy of the gas, we will follow these steps:

### Step 1: Identify the given values
- Mass of the gas (m) = 5 g
- Initial temperature (T1) = 15 °C
- Final temperature (T2) = 25 °C
- Specific heat capacity at constant volume (s) = 0.172 cal/g°C
- Mechanical equivalent of heat = 4.2 J/cal
...