Manipulation of the independent variable should change the dependent variable, the value of which "depends" on the independent variable's change in value.
An Exothermic reaction releases energy into the surroundings and so the products have more potential energy then the reactants. The enthalpy change is a negative value. Whereas, an endothermic reaction involves the absorption of energy into the system and so the reactants have more potential energy than the products. The enthalpy change is a positive value. This is clearly represented in energy profile diagrams.
Answer:
causes a substance to change from a liquid to a solid.
Explanation:
