An increase in the concentration of the reactants of a reaction leads to change in :

Question

For the reaction \( \text{N}_2(g) + 3 \, \text{H_2(g) \rightleftharpoons 2 \, \text{NH}_3(g) \), the equilibrium constant \( K_c \) at a certain temperature is \( 0.5 \). If the initial concentrations of \( \text{N}_2 \), \( \text{H}_2 \), and \( \text{NH}_3 \) are \( 1.0 \, \text{mol/L} \), \( 1.0 \, \text{mol/L} \), and \( 0 \, \text{mol/L} \) respectively, calculate the equilibrium concentrations of all species.}

Answer 1

To solve this question, let's analyze the effect of increasing the concentration of reactants on different factors in a chemical reaction.

Activation energy: This is the minimum energy required for a reaction to occur. The activation energy is an intrinsic property of a reaction and does not change with the concentration of reactants.
Heat of reaction: Also known as enthalpy change, this depends on the nature of the reactants and products but not on their concentrations.
Threshold energy: This is the minimum energy that must be overcome for the reaction to proceed and is closely related to activation energy. Like activation energy, threshold energy is not influenced by concentration changes.
Collision frequency: In chemical kinetics, this refers to the number of collisions per unit time between reactant molecules. According to collision theory, increasing the concentration of reactants increases the number of molecules available, thereby increasing the collision frequency.

Since increasing the concentration of reactants raises the number of collisions among molecules, this directly affects the collision frequency. Therefore, the correct answer is collision frequency.

Answer 2

To solve this question, let's analyze the effect of increasing the concentration of reactants on different factors in a chemical reaction.

Activation energy: This is the minimum energy required for a reaction to occur. The activation energy is an intrinsic property of a reaction and does not change with the concentration of reactants.
Heat of reaction: Also known as enthalpy change, this depends on the nature of the reactants and products but not on their concentrations.
Threshold energy: This is the minimum energy that must be overcome for the reaction to proceed and is closely related to activation energy. Like activation energy, threshold energy is not influenced by concentration changes.
Collision frequency: In chemical kinetics, this refers to the number of collisions per unit time between reactant molecules. According to collision theory, increasing the concentration of reactants increases the number of molecules available, thereby increasing the collision frequency.

Since increasing the concentration of reactants raises the number of collisions among molecules, this directly affects the collision frequency. Therefore, the correct answer is collision frequency.

An increase in the concentration of the reactants of a reaction leads to change in :

The Correct Option is D

Solution and Explanation

Top Questions on Equilibrium Constant

Questions Asked in NEET (UG) exam