Thermodynamics, Kinetics and Equilibrium

Front

Entropy

Back

the degree of disorder or randomness in the system.

Answer explanation

The correct definition of entropy is 'the degree of disorder or randomness in the system.' It quantifies how spread out or chaotic the energy and particles are within a system.

Front

What letter represents the activation energy? Options: A, B, C, D

Back

A

Answer explanation

The letter 'A' represents the activation energy in chemical reactions, indicating the minimum energy required for a reaction to occur. Therefore, the correct answer is A.

Front

What letter represents the activation energy of the reverse reaction? Options: A, C, E, F

Back

E

Answer explanation

The letter 'A' represents the activation energy in chemical reactions, indicating the minimum energy required for a reaction to occur. Therefore, the correct answer is A.

Front

What letter represents the PE of the products?

Back

F

Answer explanation

The letter 'A' represents the activation energy in chemical reactions, indicating the minimum energy required for a reaction to occur. Therefore, the correct answer is A.

Front

What letter represents the activated complex? Options: A, B, C, D

Back

D

Answer explanation

The letter 'A' represents the activation energy in chemical reactions, indicating the minimum energy required for a reaction to occur. Therefore, the correct answer is A.

Front

What letter represents the PE of the reactants? Options: A, B, C, D, E

Back

B

Answer explanation

The letter 'A' represents the activation energy in chemical reactions, indicating the minimum energy required for a reaction to occur. Therefore, the correct answer is A.

Front

What letter represents the heat of reaction of the reactants?

Back

C

Answer explanation

The letter 'A' represents the activation energy in chemical reactions, indicating the minimum energy required for a reaction to occur. Therefore, the correct answer is A.

Front

Enthalpy deals with the measurement of

Back

Heat energy

Answer explanation

Enthalpy is a thermodynamic quantity that measures the total heat content of a system. Therefore, it specifically deals with heat energy, making 'Heat energy' the correct choice.

Front

What type of reaction occurs in a hand warmer?

Back

exothermic

Answer explanation

A hand warmer generates heat through an exothermic reaction, where energy is released as chemical bonds form. This process warms the surrounding environment, making it effective for keeping hands warm.

Front

As CO₂(g) changes to CO₂(s), the entropy of the system

Back

decreases

Answer explanation

As CO2(g) transitions to CO2(s), it moves from a gaseous state, which has higher disorder, to a solid state, which is more ordered. This results in a decrease in entropy, making 'decreases' the correct choice.