Question

5 moles of an ideal gas at ${27}^{0}C$ expands isothermally and reversibly from a volume of 6L to 60L. The work done in kJ is :

• A. -14.7
• B. -28.72
• C. + 28.72
• D. - 56.72

Answer 1

The correct option is B -28.72

For isothermal and reversible process:

Work done, W $=$ - nRT In $\frac{V_2}{V_1}$

$=$ - 5 x 8.314 x 300 In (10)

$=$ - 28715 J

$\simeq$ - 28.72 KJ