KCET · Chemistry · Thermodynamics (C)
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
- C The total energy of the universe remains constant
- D The total entropy of the universe remains constant
Answer & Solution
Correct Answer
(C) The total energy of the universe remains constant
Step-by-step Solution
Detailed explanation
Mole fraction in vapour phase
\[
\begin{aligned}
y_{\Lambda} &=\frac{\mathrm{p}_{A} x_{A}}{p_{T}} \\
&=\frac{p_{\Lambda} \times \frac{1}{3}}{\frac{5}{3} \mathrm{p}_{\Lambda}}=\frac{1}{5}=0.2
\end{aligned}
\]
\[
\begin{aligned}
y_{\Lambda} &=\frac{\mathrm{p}_{A} x_{A}}{p_{T}} \\
&=\frac{p_{\Lambda} \times \frac{1}{3}}{\frac{5}{3} \mathrm{p}_{\Lambda}}=\frac{1}{5}=0.2
\end{aligned}
\]
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- Methane can be converted into ethane by the reactionsKCET 2013 Easy
- Match List-I (Laws) with the List-II (Mathematical expressions):
Codes:List-I List-II (a) Henry's law (i) \(p_1 = p_1^0 x_1\) (b) Raoult's law (ii) \(p = K_H \chi\) (c) First law of thermodynamics (iii) \(\Lambda_m = v_+ \lambda_+ + v_- \lambda_-\) (d) Kohlrausch's law (iv) \(\Delta U = q + w\) KCET 2026 Medium - In which one of the pairs of ion given, there is an ion that forms a co-ordination compound with
both aqueous sodium hydroxide and ammonia and an other ion that forms a co-ordination
compound only with aqueous sodium hydroxide?KCET 2014 Easy - The relation between \(\Delta H\) and \(\Delta U\) isKCET 2007 Medium
- The maximum number of possible optical isomers in 1-bromo-2-methyl cyclobutane isKCET 2011 Hard
- IUPAC name of the compound is
KCET 2023 Easy
More PYQs from KCET
- Two events \( A \) and \( B \) will be independent ifKCET 2017 Medium
- The variations of kinetic energy \(\mathrm{K}(\mathrm{x})\), potential energy \(\mathrm{U}(\mathrm{x})\) and total energy as a function of displacement of a particle in SHM is as shown in the figure. The value of \(\left|x_0\right|\) is
KCET 2025 Medium - Gametophyte is the dominant phase in the life cycle ofKCET 2011 Easy
- If the vectors \(2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}+4 \hat{\mathbf{k}}, 2 \hat{\mathbf{i}}+\hat{\mathbf{j}}-\hat{\mathbf{k}}\) and \(\lambda \hat{\mathbf{i}}-\hat{\mathbf{j}}+2 \hat{\mathbf{k}}\) are coplanar, then the value of \(\lambda\) isKCET 2020 Easy
- A coil of inductive reactance \( \frac{1}{\sqrt{3}} \Omega \) and resistance \( 1 \Omega \) is connected to a \( 200 \mathrm{~V}, 50 \mathrm{~Hz} \) ac.
supply. The time lag between maximum voltage and current isKCET 2017 Easy - The point of intersection of the line \(x+1=\frac{y+3}{3}=\frac{-z+2}{2}\) with the plane \(3 x+4 y+5 z=10\) isKCET 2023 Easy