Correct Answer - C::D
Given that, the work of reversible expansion under isothernal condition can be calculated by using the expression
`W = - nRT ln. (V_(1))/(V_(1))`
`V_(1) = 10 V_(i)`
`T_(2) = 600 K`
`T_(1) = 300 K`
Putting these values in above expression
`W_(600 K) = 1 xx R xx 600 ln. (10)/(1)`
`W_(300 K) = 1 xx R xx 300 K ln. (10)/(1)`
Ration `= (W_(600 K))/(W_(300 K)) = (1 xx R xx 600 K ln.(10)/(1))/(1 xx R xx 300 K ln. (10)/(1)) = (600)/(300) = 2`
For isothermal expansion of ideal gases, `Delta U = 0`. Since, temperature is contant this means there is no change in internal energy. Therefore, `Delta U = 0`