Given for the reaction A⟶P : Temperature T=300K Entropy change ∆S‌system ‌=5J∕K∕mol The heat absorbed by the system can be calculated using the formula: ∆H‌system ‌=T×∆S‌system ‌ Substitute the given values: ∆H‌system ‌=300K×5J∕K∕mol=1500J∕mol Since the answer is needed in kilojoules per mole, convert joules to kilojoules: 1500J∕mol=1.5kJ∕mol Thus, the heat absorbed by the system is 1.5kJ∕mol.