Thermochemistry is the chemistry of energy.
For exothermic reaction, delta H is negative and for endothermic reactions, delta H is positive.
Equation is Q=MC delta T.
Q represents energy, M represents mass, C represents heat capacity and delta represents change in temprerature.
Heat capacity is the amount of energy required to raise the temperature of 1g of X by 1 degree C. And delta T is final temperature minus initial temperature.
1cal is about 4.184 Joule and it is from James Prescott Joule who found this unit.
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