what happens to energy released by an exothermic enthalpy change??
It is released to heat the reaction, the containers, the surrounding air, et al.
When Zn is Zn(NO3)2 has it gain or lost electrons is it oxidized or reduced.
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Zn loses electrons to become Zn^2+.
When an exothermic enthalpy change occurs, the energy is released into the surroundings. Let me explain how you can understand this concept:
1. Understand Enthalpy: Enthalpy is a measure of the total heat content in a system. It includes both internal energy and energy changes due to pressure and volume changes. Enthalpy change (∆H) is the difference in enthalpy between the reactants and products in a chemical reaction.
2. Exothermic Reaction: An exothermic reaction is one in which heat energy is released as a product. During an exothermic enthalpy change, the energy is transferred from the system (reactants) to the surroundings (products), resulting in a decrease in enthalpy (∆H < 0).
3. Energy Transfer: The energy released in an exothermic enthalpy change is typically in the form of heat. It can be released as radiation (light), transferred through conduction (direct contact), or convection (through a fluid medium).
4. Effect on Surroundings: The energy released during an exothermic reaction will increase the temperature of the surroundings. It can be felt as warmth or heat if the reaction occurs in an open system. However, if the reaction occurs in a closed system with no heat transfer, the energy manifests as an increase in internal energy.
5. Examples: Common examples of exothermic reactions include combustion reactions, such as the burning of fuels (releasing heat and light), and neutralization reactions, such as the reaction between an acid and a base (releasing heat).
Remember that energy is conserved in chemical reactions, so the energy released by an exothermic enthalpy change must be accounted for in the energy balance of the system and its surroundings.