The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of `10 dm^(3)` to a volume of `100dm^(3)` at `27^(@)C` is

Options

A. `- 35.8 kJ `
B. `-11.49kJ`
C. `- 32.3 kJ `
D. `- 38.29 kJ `

Answer

B

Explanation

`W_(max)= -nRT " ln ' (V_2)/(V_1) =- 2xx8.314 xx 300 xx 2.303 log (100)/(10)`
`=- 11488 J =-11.488 kJ`