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reaxn

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The experiment is joule heating and I'm trying to calculate the filament resistance.

1.) mass of the calorimeter cup 49.5g

specific heat of the aluminum cup: 0.22 cal/kg*K

mass of calorimeter cup w/ water 232.5g

initial water temp. 20.5 C

voltage across heater 7.3V

current through heater 5A

final water temp 32.7 C

time interval 10mins

calculated filament resistance = ?

ΔQ = mcΔT ; have to use this twice, mass and heat capacity of water + mass and heat capacity of the aluminum calorimeter cup

U = I squared * Resistance * time

3.) I have no clue where to go :| I've attempted numerous times but I haven't come out with a resistance anywhere close to what I should be getting.

can anybody help me out ?

1.) mass of the calorimeter cup 49.5g

specific heat of the aluminum cup: 0.22 cal/kg*K

mass of calorimeter cup w/ water 232.5g

initial water temp. 20.5 C

voltage across heater 7.3V

current through heater 5A

final water temp 32.7 C

time interval 10mins

calculated filament resistance = ?

ΔQ = mcΔT ; have to use this twice, mass and heat capacity of water + mass and heat capacity of the aluminum calorimeter cup

U = I squared * Resistance * time

3.) I have no clue where to go :| I've attempted numerous times but I haven't come out with a resistance anywhere close to what I should be getting.

can anybody help me out ?

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