The letter in this energy profile diagram of an exothermic change that signifies energy is B;
An exothermic reaction is one in which heat is liberated to the surroundings. The surrounding becomes hotter at the end of the change. B is the enthalpy change of the reactionA is the activation energy C is the reactant D is the product
Answer from: Quest
Temperature and pressure
Answer from: Quest
Heat is involved in chemical change in two ways; chemical changes either result in heat being added to or removed from an object, and chemical changes require a certain amount of heat before they can take place.
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