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clarissalehne
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Specific Heat Capacity Lab
I conducted a lab where I heated 100ml of water using a heating coil with a current of 4A passing through it. The temperature data turned out beautifully, with the temperature rising evenly until it plateaued just under 100 degrees celsius as it began to change phase.
My aim was to find the specific heat capacity of the water by graphing IV (current times voltage) against ΔT (change in temperature) as this would give me a slope equal to mc/t.
Theory:
P=VI
P/t=Q
Q=tVI
Q=mcΔT
--> tVI=mcΔT
Strangely though, the graph of IV vs. ΔT is not linear but follows a logarithmic regression. When I plot IV vs. LN(ΔT) I get a linear graph. How can I find a slope that I can use to find the specific heat capacity? Also, is there something wrong with my data? Should the relationship be linear?
I conducted a lab where I heated 100ml of water using a heating coil with a current of 4A passing through it. The temperature data turned out beautifully, with the temperature rising evenly until it plateaued just under 100 degrees celsius as it began to change phase.
My aim was to find the specific heat capacity of the water by graphing IV (current times voltage) against ΔT (change in temperature) as this would give me a slope equal to mc/t.
Theory:
P=VI
P/t=Q
Q=tVI
Q=mcΔT
--> tVI=mcΔT
Strangely though, the graph of IV vs. ΔT is not linear but follows a logarithmic regression. When I plot IV vs. LN(ΔT) I get a linear graph. How can I find a slope that I can use to find the specific heat capacity? Also, is there something wrong with my data? Should the relationship be linear?
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