Entropy Quiz 1

Question 1

A water heater is used to heat a gallon of water, the temperature of the water in the gallon increases. If some heat escapes from the gallon, then how will the entropy of the surroundings change?

Accepted Answer

Increases

Answer

Decreases

Answer

Remains unchanged

Answer

None of the above

Question 2

Entropy is maximum in a reaction when,

Accepted Answer

Solid turns into gas

Answer

Liquid turns into gas

Answer

Solid turns into liquid

Answer

None of the above

Question 3

A liquid of mass $$3$$ kg is heated, initially the liquid is at a temperature of $${{10}^{0}}$$C and is heated until its temperature reaches $${{90}^{0}}$$C. Calculate the change in entropy. Take the specific heat of the liquid is $$4.2$$ kJ/kg K.

Accepted Answer

$$1008$$ kJ

Answer

$$1000$$ kJ

Answer

$$900$$ kJ

Answer

$$1200$$ kJ

Question 4

When the entropy of any isolated system becomes maximum then,

Accepted Answer

The system is at equilibrium

Answer

The system is about to reach equilibrium

Answer

The system is unstable

Answer

None of the above

Question 5

The physical property entropy of the system in a reaction when a substance in solid state changes into liquid state,

Accepted Answer

Increases

Answer

Decreases

Answer

Remains same

Answer

None of the above