A 13.5 g spoon at 20 degrees celcius is completely submerged in a styrofoam cup containing 200 g of hot water at 90 degrees celcius. If the temperature of the water is lowered 1 degree celcius . What is the specific heat capacity of the spoon ?
I got 8.2x10² J/kg°C but the answer key says 9.0x10²J/kg°C. Please don't put answers in calories.
I got 8.2x10² J/kg°C but the answer key says 9.0x10²J/kg°C. Please don't put answers in calories.
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specific heat of water is 4.186 kJ/kgC
or 4.186 J/gC
Energy to lower the temp by 1º is 4.186 J/gC x 200g x 1K = 837 J
that energy has to come from the spoon, which warms up from 20º to 89º
837 J = SH x 0.0135 kg x 69º
SH = 899 J/kgK
or 4.186 J/gC
Energy to lower the temp by 1º is 4.186 J/gC x 200g x 1K = 837 J
that energy has to come from the spoon, which warms up from 20º to 89º
837 J = SH x 0.0135 kg x 69º
SH = 899 J/kgK