Hess Law-Multiple Choice Questions Quiz

Interactive MCQs on “Hess Law”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: Hess's Law is related to:

(a) Thermodynamics
(b) Kinetics
(c) Quantum mechanics
(d) Electrochemistry

Question 2: Hess's Law is based on which fundamental law of thermodynamics?

(a) Boyle's Law
(b) Charles's Law
(c) First Law of Thermodynamics
(d) Second Law of Thermodynamics

Question 3: Hess's Law allows us to determine the enthalpy change of a reaction by:

(a) Measuring the reaction rate
(b) Measuring the equilibrium constant
(c) Measuring the temperature change
(d) Calculating from known enthalpy changes of other reactions

Question 4: Hess's Law is particularly useful for calculating enthalpy changes for reactions that are difficult to measure directly, such as:

(a) Combustion reactions
(b) Acid-base reactions
(c) Oxidation-reduction reactions
(d) Electrolysis reactions

Question 5: Which property of enthalpy change remains unchanged when reactions are added or subtracted to calculate the overall enthalpy change?

(a) Entropy
(b) Activation energy
(c) Gibbs free energy
(d) Enthalpy is a state function

Question 6: According to Hess's Law, the enthalpy change of a reaction is the same whether it occurs in one step or in a series of steps, as long as:

(a) The temperature is constant
(b) The pressure is constant
(c) The initial and final states are the same
(d) The pathways are reversible

Question 7: Hess's Law is used to calculate the standard enthalpy change of a reaction under:

(a) Non-standard conditions
(b) Standard conditions
(c) Variable pressure conditions
(d) Variable temperature conditions

Question 8: When combining reactions to apply Hess's Law, the coefficients of the reactions are often:

(a) Multiplied by a constant
(b) Divided by a constant
(c) Added together directly
(d) Left unchanged

Question 9: Hess's Law is a consequence of the law of conservation of:

(a) Energy
(b) Mass
(c) Momentum
(d) Charge

Question 10: Which type of diagram is commonly used to visualize the application of Hess's Law by showing the intermediate steps and reactions involved?

(a) Phase diagram
(b) Enthalpy diagram
(c) Activation energy diagram
(d) Entropy diagram