In photosynthesis, green plants convert carbon dioxide and water into glucose (C6H12O6) according to the following equation: 6 CO2(g) + 6 H2O(l) → C6H12O6(aq) + 6 O2(g) Is the reaction endothermic or exothermic?

Photosynthesis is the biochemical process by which green plants, algae, and some bacteria convert light energy into chemical energy. During this process, carbon dioxide and water are transformed into glucose and oxygen, utilizing sunlight as the energy source. The overall reaction can be summarized by the equation provided, highlighting the conversion of inorganic substances into organic compounds.

Endothermic reactions absorb energy from their surroundings, resulting in a decrease in temperature of the environment, while exothermic reactions release energy, often in the form of heat, leading to an increase in temperature. In the context of photosynthesis, the process requires energy input from sunlight, indicating that it is endothermic, as it absorbs energy to drive the conversion of carbon dioxide and water into glucose.

In chemical reactions, energy transfer is a crucial aspect that determines whether a reaction is endothermic or exothermic. The energy required to break bonds in reactants must be compared to the energy released when new bonds form in products. In photosynthesis, the energy absorbed from sunlight is used to create glucose, thus illustrating the concept of energy transfer where the input of energy is essential for the reaction to proceed.