Answer:
Enthalpy /ˈɛnθəlpi/ ( listen) is a property of a thermodynamic system, defined as the sum of the system's internal energy and the product of its pressure and volume. It is a convenient state function preferred in many measurements in chemical, biological, and physical systems at a constant pressure.
Explanation:
Endothermic processes require an input of energy to proceed and are signified by a positive change in enthalpy. Exothermic processes release energy upon completion, and are signified by a negative change in enthalpy.
Answer:
The sign of q for an endothermic process is positive because the system is gaining heat. A chemical reaction or physical change is exothermic if heat is released by the system into the surroundings.
Explanation:
Because the surroundings is gaining heat from the system, the temperature of the surroundings increases.
