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What you need to know:
· The number of moles of the reactant
· q=mcT
· q: heat in joules
· m: mass of water in the calorimeter
· c: SHC of water (4.18)
· T: The change in temperature…read more

Slide 3

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Calorimeter
· An insulated container in which a reaction
can take place and the T can be
measured without much energy being lost
to the surroundings.…read more

Slide 4

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Example
· 1.16g of an organic fuel, with an Mr of 58,
was burned completely in oxygen. The
heat formed raised 100g of water from
295.3K to 357.8K.
· Calculate the Hc…read more

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Calculate q
· q=mcT
· m= 100
· c= 4.18
· T= (357.8-295.3)
· m * c * T = 26125 J
· Convert to KJ = 26.125
· Convert to a negative number because
combustion is exothermic= -26.125 KJ…read more

Slide 6

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Find how many moles of fuel
created the heat
· n=Mass/M
· Mass= 1.16
· M= 58
· So...
· n= 0.02 moles…read more

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