Chemistry Calorimetry
How many calories are in one Calorie?
1,000
How many joules are in a calorie?
4.184 J
Specific heat of water
4.184 j/gx°c
Endothermic reaction
Absorbs heat
Calorimeter
An insulated device used for measuring the amount of heat absorbed or released in a chemical reaction
Thermochemical equation includes...
Balanced chemical equation that includes the states of all reactants and products and the energy change (usually in delta H)
Law of conservation of energy
Energy cannot be created nor destroyed, but can be transferred from one form to another
If free energy is at zero...
Equilirium
Spontaneous reactions include...
Exothermic reactions and some endothermic
Gibb's free energy (delata G)
Free energy that is able to do work Delata G = delata H - T (delta S)
Enthalpy (deltaH)
Heat content of a system at a constant pressure
If free energy is positive
Nonspontaneous
Heat of surrounding is _____ of the heat of the reaction?
Opposite
Spontaneous Process
Process that can proceed on it's own without inside intervention (ex fizzing of soda)
Entropy (S)
Quantitative measure of disorder randomness
Exothermic reaction
Releases heat
If a free energy is negative...
Spontaneous
Thermochemistry
Study of heat changes in reactions
Energy
The ability to do work
Specific Heat (C)
The amount of heat or energy needed to raise the temperature of 1g by 1⁰C
Calorie
The amount of heat or energy needed to raise the temperature of 1g of water by one ⁰C
How can the transfer of heat be measured?
The change in temperature
Heat (q)
The energy that flows from a warm object to a cooler object, measured in calorie or joule
Calorimetry
The study of heat flow and heat measurement. These experiments determine the heat changes of reactions by changes in a calorimeter.
Heat formula
q=m∙c∙deltaT
Thermochemistry equation
qrxn/ mol S = delata H/ mol S