Energy in Chemical Reactions

Energy in Chemical Reactions

And enthalpy changes

1. The law of conservation of energy states that energy can not be transformed from one form of energy to forms of energy.

2. Heat is the reaction of the system to move the heat to the environment or from the environment to a system that system temperature after a reaction similar to the system before the reaction temperature.

a. Eksotrerm reaction is the transfer of heat (q) of the system kelingkungan

b. Endothermic reaction is the transfer of heat (q) of the old system.

formula:

q = m.c. delta T

The characteristics of an exothermic reaction

1. Heat menagalir kelingkungan system

2. Enthalpy product is smaller than the enthalpy of the reactants

3. Enthalpy changes are negative

4. Menyenbabkan rise in ambient temperature around

The characteristics of endothermic reactions

1. Heat flows from the old system

2. Enthalpy product is greater than the enthalpy of the reactants

3. Changes in enthalpy is positive

4. Causes a decrease in the ambient temperature around