1 mole of an ideal gas at 25°C is subjected to expand reversibly ten times of its initial volume. The change in entropy due to expansion is:
a. 19.15JK⁻¹mole⁻¹
b. 22.15JK⁻¹mole⁻¹
c. 16.15JK⁻¹mole⁻¹
d. none