You find a penny in the snow. How much heat is absorbed by the penny as it warms

Question

You find a penny in the snow. How much heat is absorbed by the penny as it warms from the temperature of the snow, which is -8.0°C, to the temperature of your body (37.0 °C)? Assume the penny is pure copper and has a mass of 3.10 grams. A gas tank in a home barbeque contains 13.2 kg of propane, C,He. Calculate the heat in kJ associated with the complete combustion of ALL the propane in the tank. The thermochemical equation for the complete combustion of propane is provided below. CsHa(g) + 502(g) 3CO2(g) + 4H20(g) =-2044 k/

Explanation / Answer

1)

we have:

m = 3.1 g

C = 0.385 J/g.oC

Ti = -8 oC

Tf = 37 oC

we have below equation to be used:

Q = m*C*(Tf-Ti)

Q = 3.1*0.385*(37.0-(-8.0))

Q = 53.7 J

Answer: 53.7 J

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