Question

This diagram would represent the enthalpy changes in which of the following?

boiling liquid

hot pack

cold pack

melting solid

Answer 1

Hot Pack

Step-by-step explanation:

took the test to prove right answer

Answer 2

Answer is: hot pack.
This is exothermic reaction (energy or heat is released), because reactants have higher energy than products of reaction. Hot pack is mixture of water and salt (usually magnesium sulfate or calcium chloride). When salt dissolves in water, more energy is released than taken in, so process is exothermic.