Which of the following would have zero entropy?

Which of the following would have zero entropy?

Na is our answer choice because it meets the two criteria needed for zero entropy. Firstly, it is of considerable orderliness and hence, entropy isn’t expected in its molecule. Also, it has no disturbance in the case of temperature as it is at absolute zero.

Is freezing exothermic?

When water becomes a solid, it releases heat, warming up its surroundings. This makes freezing an exothermic reaction.

Is the universe a closed system?

The universe itself is a closed system, so the total amount of energy in existence has always been the same. The forms that energy takes, however, are constantly changing.

Why is ice melting a spontaneous reaction?

This process took place without any intervention from your side. Heat absorbed by the ice from surrounding is due to set of conditions not due to your intervention. Thus we can consider melting of ice as a spontaneous process(or reaction).

Is spontaneous process reversible?

Spontaneous processes are irreversible. Like total energy, E, and enthalpy, H, entropy is a state function. The second law of thermodynamics states that the entropy of the universe increases for spontaneous processes, and the entropy of the universe does not change for reversible processes.

Does melting ice release energy?

As ice melts or liquid water evaporates, the molecules change state — from a solid to a liquid, from a liquid to a gas, or from a solid directly to a gas. This energy is released when the liquid water subsequently freezes, and it is called the latent heat of fusion.

Is heat flow spontaneous?

Heat flows from hot to cold objects. In other words, heat can flow spontaneously from a cold object to a hot object without the need to invest energy in the process, as is required by a domestic fridge.

What way does heat flow?

And unless people interfere, thermal energy — or heat — naturally flows in one direction only: from hot toward cold. Heat moves naturally by any of three means. The processes are known as conduction, convection and radiation. Sometimes more than one may occur at the same time.