In which of the following processes entropy increases? A. A liquid evaporates to vapour. B. Temperature of a crystalline solid lowered from 130 K to 0 K . C. 2 NaHCO _ 3( ~s ) Na ₂ CO _ 3( ~s ) + CO _ 2( ~g ) + H ₂ O _ ( g ) D. Cl _ 2( ~g )

Question

In which of the following processes entropy increases? A. A liquid evaporates to vapour. B. Temperature of a crystalline solid lowered from 130 K to 0 K . C. 2 NaHCO _ 3( ~s ) Na ₂ CO _ 3( ~s ) + CO _ 2( ~g ) + H ₂ O _ ( g ) D. Cl _ 2( ~g ) 2 Cl _ ( g ) Choose the correct answer from the options given below:

Quantrex Academy · Accepted Answer

Correct answer: B. A, C and D

When a liquid evaporates to vapour entropy increases 2 NaHCO _ 3( ~s ) Na ₂ CO _ 3( ~s ) + CO _ 2( ~g ) + H ₂ O _ ( g ) Number of gaseous product molecules increases so entropy increases. Cl _ 2( ~g ) 2 Cl _ ( g ) 1 mole Cl _ 2( ~g ) form 2 ~mol Cl _ ( g ) . So entropy increases.

Options

Correct answer

Step-by-step solution

More from Thermodynamics (C)