Question

a container of one litre capacity filled with one mole of ideal gas is connected to an evacuated vessel of 9. calculate the change in entropy? [R = 1.987 ]​

Answer 1

Change in entropy is $\bf {4.366\;cal\; K^{-1} mol^{-1}}$

Explanation:

For an ideal gas, change in entropy is given below:

$\triangle S=nR\; ln \frac{ v_f}{v_i}$

$= 1 \times 1.987 \times 2.303 \times log \frac{9}{1}$

$= 4.366\;cal\; K^{-1} mol^{-1}$

Thus change in entropy is $\bf{4.366\;cal\; K^{-1} mol^{-1}}$