Entropy of the system decreases when

Home / Chemical Engineering / Chemical Engineering Thermodynamics / Question

Examveda

Entropy of the system decreases, when

A. Snow melts into water

B. A gas expands spontaneously from high pressure to low pressure

C. Water is converted into ice

D. Both B & C

Answer: Option D

Solution (By Examveda Team)

Since, the degree of randomness decreases when the water is converted to ice the entropy decreases and also in an similar way when the gas is expanding from high pressure to low pressure the entropy increases.

This Question Belongs to Chemical Engineering >> Chemical Engineering Thermodynamics

Join The Discussion

Comments (1)

Santosh Kumar:

11 months ago

Why the option B&C correct?

Related Questions on Chemical Engineering Thermodynamics

Sublimation temperature of dry ice (solid CO₂) is __________ °C.

A. -273

C. -78

D. 5

View Answer

The equation relating E, P, V and T which is true for all substanes under all conditions is given by $${\left( {\frac{{\partial {\text{E}}}}{{\partial {\text{V}}}}} \right)_{\text{T}}} = {\text{T}} \cdot {\left( {\frac{{\partial {\text{P}}}}{{\partial {\text{T}}}}} \right)_{\text{H}}} - {\text{P}}{\text{.}}$$ This equation is called the

A. Maxwell's equation

B. Thermodynamic equation of state

C. Equation of state

D. Redlich-Kwong equation of state

View Answer

Henry's law is closely obeyed by a gas, when its __________ is extremely high.

A. Pressure

B. Solubility

C. Temperature

D. None of these

View Answer

If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero.

A. Enthalpy

B. Volume

C. Both A & B

D. Neither A nor B

View Answer