Once the system reaches equilibrium at 675°C additionally H2 is added in the temperature is held constant which statement best describes how this affects the value of K

The given question is incomplete. The complete question is :

Once the system reaches equilibrium at 675°C additionally H2 is added in the temperature is held constant which statement best describes how this affects the value of K

1. The value of K increases because the formation of products is favoured.

2. The value of K decreases because the formation of reactants .

3. The value of K remains unchanged because the temperature remained constant.

4. The value of K cannot be determined as until the equilibrium concentrations are determined.

Answer : The value of K remains unchanged because the temperature remained constant.

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as K.

K has a definite value for every chemical reaction at a particular temperature.

K is independent of initial concentrations of the reactants.

K changes with the temperature change.

K depends on the nature of the reaction.

Thus as temperature is held constant,  the value of K also remains constant.