Question

Which of the following is a device used to measure energy transfer during phase changes? Calorimeter Scale Phaseometer Heater

Answer 1

the answer is calorimeter {<3} 

Answer 2

Calorimeter

Step-by-step explanation:

As the name suggest "Calori-meter", calorie is the unit of energy or heat.

So it is the apparatus which is used to measure energy transfer during any physical or chemical change like phase change.

Calorimeter can be open (constant pressure)

Calorimeter can be closed (constant colume)

If we measure heat change in open calorimeter then it gives enthalpy change of any chemical or physical change.