Question

For each of the following conditions on the reaction, select "increases, decreases, remains the same, or not enough information given in the problem to decide" that makes the statement correct.

If the reaction takes place as a constant temperature and volume, the pressure ____

If the reaction takes place at a constant temperature and pressure, the volume ____

If the reaction takes place at a constant volume in a thermally insulated container that allows no heat exchange with the outside world (or the container), the gas temperature _____

Answer 1

Solution:

Let us go to the basics first.

If the reaction takes place as a constant temperature and volume, the pressure _is constant___ (Answer)

[Reason: From Ideal Gas Eqn: PV = nRT

So, at constant temperature and volume, P = nRT/V = constant]

If the reaction takes place at a constant temperature and pressure, the volume _is CONSTANT___ (Answer)

[Reason: From Ideal Gas Eqn: PV = nRT

So, at constant temperature and pressure, V = nRT / P = constant]

If the reaction takes place at a constant volume in a thermally insulated container that allows no heat exchange with the outside world (or the container), the gas temperature __INCREASES___ (Answer)

[Reason: Due to thermal insulation (i.e., no loss of heat to the surroundings), heat generated during reaction will be utilised to increase the gas temperature.]

Thanks!!!