Chemistry Calorimetry

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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


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