Question

One mole of an ideal gas at 300 K is expanded isothermally from an initial volume of 1 litre to 10 litres. The value of $△U$ for this process is:
$(R=2calmo{l}^{-1}{K}^{-l})$

• A. 163.7 cal
• B. zero
• C. 138.1 cal
• D. 9 atm L

Answer 1

The correct option is B zero

Internal energy of an ideal gas is dependent on the temperature of the process.
For an isothermal process, the change in internal energy $\left(\Delta U\right)$ = 0 during isothermal expansion of a gas.