In which of the following reactions is Delta | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Entropy $(S)$ is a measure of the randomness or disorder of a system. $\Delta S$ is positive when the disorder of the system increases.$1$. $H_2O(

Vedclass · Accepted Answer

$H_2O(\ell) \rightarrow H_2O_{(g)}$

Vedclass · Answer

(B) Entropy $(S)$ is a measure of the randomness or disorder of a system. $\Delta S$ is positive when the disorder of the system increases.$1$. $H_2O(\ell) \rightarrow H_2O_{(s)}$: Liquid to solid represents a decrease in disorder,so $\Delta S $2$. $H_2O(\ell) \rightarrow H_2O_{(g)}$: Liquid to gas represents a significant increase in disorder,so $\Delta S > 0$.$3$. $N_2(g, 1 \ atm) \rightarrow N_2(g, 10 \ atm)$: Increasing pressure at constant temperature decreases the volume available to gas molecules,decreasing disorder,so $\Delta S $4$. $Fe_{(s)}, 400 \ K \rightarrow Fe_{(s)}, 300 \ K$: Decreasing temperature decreases the kinetic energy and vibrational motion of atoms in the solid,decreasing disorder,so $\Delta S Therefore,the correct option is $B$.

In which of the following reactions is $\Delta S$ positive?

Similar Questions

The entropy change involved in the isothermal reversible expansion of $2 \, \text{mole}$ of an ideal gas from a volume of $10 \, dm^3$ to a volume of $100 \, dm^3$ at $27 \, ^oC$ is : .............. $J \, K^{-1}$

When $2 \ mol$ of an ideal gas $\left( C_{p,m} = \frac{5}{2} R \right)$ is heated from $300 \ K$ to $600 \ K$ at constant pressure,the change in entropy of the gas $\left( \Delta S \right)$ is:

The spontaneous flow of heat is always

At $298 \, K$ and $1 \, atm$ pressure,the entropies of $H_2(g)$,$Cl_2(g)$,and $HCl(g)$ are $130.6$,$223$,and $186.7 \, J \, K^{-1} \, mol^{-1}$ respectively. What is the entropy change for the reaction $H_2(g) + Cl_2(g) \rightarrow 2HCl(g)$ in $J \, K^{-1} \, mol^{-1}$?

Which of the following equations indicates an increase in entropy?

Vedclass Test Series

Exam Paper Generator

Online Exam Module