Calculating Heat Energy Released (VCE SSCE Chemistry): Flashcards

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Calculating Heat Energy Released
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Specific heat capacity definition

Energy to raise 1 g of substance by 1°C

Symbol for specific heat capacity

cc

Specific heat capacity of water

4.18 J g1 °C14.18 \text{ J g}^{-1} \text{ °C}^{-1}

Why water has high specific heat capacity

Hydrogen bonds between molecules

Formula for heat energy transferred to water

q=mcΔTq = mc\Delta T

What qq represents in q=mcΔTq = mc\Delta T

Heat energy in joules

Formula for heat of combustion

qn\frac{q}{n} (energy divided by moles of fuel)

Units for energy content of mixtures (foods/fuels)

kJ g1\text{kJ g}^{-1} (kilojoules per gram)

Main error in simple calorimetry experiments

Heat loss to surroundings (lowers calculated values)

Advantages of bomb calorimeter

Minimizes heat loss; ensures complete combustion

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