Chemistry · Thermochemistry
Work through this past-paper style MCQ, then read the full explanation. Practice more chemistry questions on mMCQ with adaptive practice and topic analytics.
Which of the following law explains that net heat change in a reaction is same whether it takes place through two or more different ways?
- A
Born Haber cycle
- B
Joule's principle
- C
Hess's law
- D
Law of conservation of energy
Hess’s Law states that the overall enthalpy change of a reaction is independent of the pathway followed as long as the initial and final conditions remain the same.
Born Haber cycle is an application of Hess’s law that involves the formation of a solid crystalline ionic compound from the elemental atoms in their standard state and the enthalpy of formation of the solid compound such that the net enthalpy becomes zero.
Joule’s principle states that the rate of production of heat by a constant direct current is directly proportional to the resistance of the circuit and to the square of the current.
Hess’s Law states that the overall enthalpy change of a reaction is independent of the pathway followed as long as the initial and final conditions remain the same.
Law of Conservation of energy states that energy can neither be created nor destroyed but can be converted from one form to the other.
Tagged under Chemistry · Thermochemistry · 2021