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.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.