How many joules of heat are needed to raise the temperature of 25 g of aluminum from 30°C to 72°C, if the specific heat of aluminum is 900 J/kg°C?
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here m= 25g =25 ×10 power -3 kg ,
dT = 72-30 = 42°C, S= 900J/kg
Q=SmdT
Q= 900 ×25 ×10^-3 × 42
Q = 945000 × 10^-3
Q = 945 J
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