Question

The melting of ice is an endothermic change. What best describes the temperature conditions that are likely to make this a spontaneous change?

Any temperature, because entropy increases during melting.
Any temperature, because entropy decreases during melting.
Low temperature only, because entropy decreases during melting.
High temperature only, because entropy increases during melting.

Answer 1

Answer: Option (d) is the correct answer.

Step-by-step explanation:

A reaction in which heat is absorbed by the molecules of a substance is known as an endothermic reaction.

For example, when ice melts then molecules of ice gain kinetic energy due to which they tend to move apart from each other.

As a result, solid state changes into liquid state.

Also, it is known that entropy is the degree of randomness. So, increase in kinetic energy of a substance tends to increase entropy.

As kinetic energy is proportional to temperature through the relation as follows.

K.E =
`(3)/(2)kT`

Therefore, we can conclude that the statement high temperature only, because entropy increases during melting best describes the temperature conditions that are likely to make this a spontaneous change.

Answer 2

D

Step-by-step explanation:

Entropy is the measurement of disorder. The warmer the temperature the more the disorder. As ice melts it goes from low disorder to much higher disorder.

The question is not exactly clear. What I just wrote is closest to D so use that as your answer, but it is very poorly worded. Higher temperatures will increase the entropy but only once the ice has melted. I cannot suggest what else you might try if D is wrong.