Change in entropy is positive for

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

Question

(D) Entropy $(S)$ is a measure of the randomness or disorder of a system. $A$ positive change in entropy $(\Delta S > 0)$ occurs when the disorder of

Vedclass · Accepted Answer

$2O_3(g) \longrightarrow 3O_2(g)$

Vedclass · Answer

(D) Entropy $(S)$ is a measure of the randomness or disorder of a system. $A$ positive change in entropy $(\Delta S > 0)$ occurs when the disorder of the system increases.$A$. $H_2O_{(g)} \longrightarrow H_2O_{(l)}$: Gas to liquid transition decreases disorder,so $\Delta S $B$. $H_2O_{(l)} \longrightarrow H_2O_{(s)}$: Liquid to solid transition decreases disorder,so $\Delta S $C$. $N_2(g) + 3H_2(g) \longrightarrow 2NH_3(g)$: The number of moles of gas decreases from $4$ to $2$,which decreases disorder,so $\Delta S $D$. $2O_3(g) \longrightarrow 3O_2(g)$: The number of moles of gas increases from $2$ to $3$. An increase in the number of gaseous molecules leads to an increase in disorder,so $\Delta S > 0$.

Similar Questions

The entropy values (in $J \, K^{-1} \, mol^{-1}$) of $H_{2(g)} = 130.6$,$Cl_{2(g)} = 223.0$,and $HCl_{(g)} = 186.7$ at $298 \, K$ and $1 \, atm$ pressure. Then entropy change for the reaction $H_{2(g)} + Cl_{2(g)} \to 2HCl_{(g)}$ is

Let us consider a reversible reaction at temperature,$T$. In this reaction,both $\Delta H$ and $\Delta S$ were observed to have positive values. If the equilibrium temperature is $T_e$,then the reaction becomes spontaneous at:

$A$ reversible adiabatic process is one in which:

According to the second law of thermodynamics,which of the following is true for a spontaneous process?

One mole of ice is converted into water at $1 \ atm$ and $273 \ K$. The entropies of $H_2O_{(s)}$ and $H_2O_{(\ell)}$ are $38.2$ and $60.01 \ J \ mol^{-1} \ K^{-1}$ respectively. The enthalpy change for the conversion is ...... $J \ mol^{-1}$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module