Thermochemistry. the study of the transfer of energy between reacting chemicals and their surroundings. Energy. the ability to do work OR the capacity to produce change measured in J or kJ Has many forms but the 2 main forms are potential energy and kinetic energy.
Energy can neither be created nor destroyed but may be converted from one form to another
Specific heat capacity (c)
Heat capacity (C)
Q? What is the heat capacity of 15 g of water?
Q? How much heat is required to raise the temperature of 3.0 g of water by 10oC?
Q? How much heat is required to raise 3.0 g of aluminum by 10oC?
On a mountaineering expedition, a climber heats water from 0oC to 50oC. Calculate the mass of water that could be warmed by the addition of 8.00 kJ of heat.
System: the components of a chemical reaction i.e. the reactants
Na + H2O
Surroundings: everything outside of the system i.e. the beaker the sodium and water are sitting in, the air
Exothermic Reactions: chemical reactions that produce heat; that is, heat is released from the system to the surroundings OR energy flows out of the system
Endothermic Reactions: chemical reactions that absorb heat; that is, the surroundings supply heat to the system OR energy flows into the system