BIOMOLECULES AND ENZYMES

Detailed explanation-1: -An example of an exothermic reaction is cellular respiration. High-energy glucose releases energy as it’s broken down. And that energy is used to generate ATP molecules. Since we know that photosynthesis absorbs light energy and stores it in its product glucose, we know that it’s an endothermic chemical reaction.

Detailed explanation-2: -Therefore, the dissolution of sugar in water is endothermic. Since sugar is absorbing heat from the water, it means to get dissolved effectively it will be needing much heat, hence, the provided or supplied water should be hot to provide enough energy to the sugar molecules to get dissolved.

Detailed explanation-3: -Energy released or stored in a reaction will often be expressed written as H, or a change in enthalpy. A positive H means that energy is stored and the reaction is endothermic. A negative H means that energy is released and the reaction is exothermic.

Detailed explanation-4: -Answer – endothermic as heat (energy) is absorbed by the sugar to change phases.

Detailed explanation-5: -decomposition reaction. Since the energy term is a product, this is an EXOthermic reaction.