Q23 / 180 · KCET 2012 · Chemistry

Which of the following statements is true?

A
The total entropy of the universe is continuously decreasing
B
The total energy of the universe is continuously decreasing
Correct answer
C
The total energy of the universe remains constant
D
The total entropy of the universe remains constant

Solution

Mole fraction in vapour phase $$ \begin{aligned} y_{\Lambda} &=\frac{\mathrm{p}_{A} x_{A}}{p_{T}} \\ &=\frac{p_{\Lambda} \times \frac{1}{3}}{\frac{5}{3} \mathrm{p}_{\Lambda}}=\frac{1}{5}=0.2 \end{aligned} $$

Hence, the correct answer is option: 'C'.

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