Question

Why are heat transfers associated with phase changes known as latent or "hidden" heats?


Heat absorbed or released in a phase change is measured in kJ while temperature is measured in °C.

The enthalpy of vaporization and enthalpy of condensation values for a substance add to zero.

The enthalpy change values for pure substances tend to be small.

The heat absorbed or released by a phase change does not cause a temperature change.

Answer 1

Do you have an idea? Any options that scream out to you as automatically being wrong?

Answer 2

i think this choice seems to be the correct one.
The enthalpy of vaporization and enthalpy of condensation values for a substance add to zero.

Answer 3

is there a reason to call them hidden??

Answer 4

hidden means that we expect something to see to hapent but we don't......
see where i am pointing???

Answer 5

^----

Answer 6

So its like the heat released as a liquid that changes to a solid is not detected by a thermometer.

The heat absorbed or released by a phase change does not cause a temperature change.

Answer 7

choose one

Answer 8

-----> The heat absorbed or released by a phase change does not cause a temperature change.

Answer 9

the energy used to melt a solid is used to pull water molecules further apart from each other. since the energy is used to do that, it can't be used to make the molecules warmer until all the solid has melted. Phase transitions occur at a single temp, that's why we refer to the boiling POINT of a liquid, not a boiling RANGE

Answer 10

so the answer I chose is wrong or correct?

Answer 11

yeap that would my ans too

Answer 12

phase changes don't change temp, is the correct answer