Final answer:
The heat released from a compost pile is the result of exothermic chemical reactions, whereby energy is released as organic matter decomposes. Such exergonic processes typically increase entropy in the system. The correct option is b. Exothermic
Step-by-step explanation:
The heat that is released from a compost pile is due to exothermic chemical reactions. These reactions involve the decomposition of organic material, a process that releases energy as it proceeds. For instance, when chlorine combines with sodium to form table salt, it is an exothermic reaction. Similarly, the breakdown of organic matter in compost results in the release of energy. This is why steam can often be seen rising from a compost pile on a chilly morning, indicating that the internal temperature of the pile is higher than the surrounding air due to the exergonic reactions taking place.
When comparing exothermic and endothermic processes, it is worth noting that an exothermic process, such as compost decomposition, typically results in an increase in entropy as it involves the release of energy. In contrast, endothermic processes, like the development of a baby from an egg, involve the absorption of energy and often result in a decrease in both enthalpy and entropy.