You can remember exergonic and endergonic by thinking of exo as meaning "exit" and endo meaning "enter".
Exergonic reactions release energy, and endergonic reactions absorbs energy,
Essentially exergonic exits energy and endergonic enters energy.
The difference between exergonic and exothermic reaction is that exergonic reactions refer to a chemical reaction that releases free energy to it's surroundings which is a spontaneous reaction.
An exothermic reaction releases heat energy to it's surroundings.
Exergonic reaction focuses on the overall energy change and exothermic reactions focuses solely on heat release also known as the enthalpy change.
An exothermic reaction is a reaction that releases heat energy into the surroundings.
For example combustion like burning wood or fuel that burns and releases heat energy into the surroundings would be exothermic energy.
Exothermic reactions release energy and often in the form of heat into it's surroundings and increases the temperature.
Exothermic and endothermic reactions compare in that endothermic reactions take in heat and exothermic reactions give off heat.
In an exothermic reaction, the surrounding temperature increases and in an endothermic reaction, the surrounding temperature decreases.
The reason why temperature decreases in endothermic reactions is because the endothermic reaction absorbs heat energy from it's surroundings.
The surrounding environment loses thermal energy and causes a drop in temperature and essentially the reaction draws heat in from it's surroundings to proceed and makes the are around it cooler.
Endothermic is cold as it absorbs heat from it's surroundings and makes the area around it feel cooler.
Exothermic reactions which are the opposite of endothermic feel hot by releasing heat.
Endothermic reactions take in heat energy from the environment and when an endothermic reaction occurs, the surrounding temperature decreases.
Cooking an egg or other food is an example of an endothermic process.
Cooking an egg is endothermic because when you cook an egg it absorbs the heat from it's surroundings like boiling water or heat from a pan to cook the egg.
This means that the heat energy is taken in to denature the proteins that are in the egg and cause the liquid to solidify into a cooked state.
Essentially the egg is taking in the heat to change it's structure.
The primary chemical change when cooking an egg is the denaturation of the eggs proteins.
This involves breaking the bonds that hold the eggs protein molecules in their original shape and the process requires heat energy to be absorbed from the environment.
As the egg cooks, the egg then draws heat from the pan or the water that it is in and causes the temperature of the cooking medium to decrease slightly.
And unlike an exothermic reaction, the cooking process of an egg does not release any significant heat back into the environment.
Endothermic chemical reactions are those in which the reactants take in heat energy from their environment to create products.
The process of boiling water is also endothermic because heat must be applied in order for the water to boil.