Question

question 20 (1 point)
the amount of heat evolved or absorbed during chemical reaction is independent of
the path by which the change has taken place, is given by russian chemist g. h. hess
and is known as hesss law. hesss law deals with
a) changes in volume of gas due to pressure.
b) changes in heats of reaction
c) changes in the temperature of water
d) changes in equilibrium constant
e) changes in rates of reaction

Explanation:

Hess's Law states that the heat change (enthalpy change) of a chemical reaction is independent of the path taken. Option a is about gas volume and pressure (related to gas laws, not Hess's Law). Option c is about water temperature change, not related to reaction heat. Option d is about equilibrium constant (related to chemical equilibrium, not Hess's Law). Option e is about reaction rates (kinetics, not Hess's Law). Option b is about heat of reaction, which matches Hess's Law.

Answer:

b) Changes in heats of reaction