Problema 2 · Química II URV 2000

Problema 2. Calor de combustión del carbono en calorímetro

A calorimeter constructed from 1500 g of copper contains 2000 g of water. A sample of 3 g of carbon is completely burned inside the device, starting from an initial temperature of 20 °C. At the end of the combustion process, the thermal equilibrium temperature of the calorimeter assembly reaches 31.3 °C. Calculate the specific heat of combustion of carbon expressed in $\mathrm{J\cdot g^{-1}}$.

Data:

$c_e(\mathrm{Cu}) = 0.389\ \mathrm{J\cdot g^{-1}\cdot K^{-1}}$; $c_e(\mathrm{H_2O}) = 4.18\ \mathrm{J\cdot g^{-1}\cdot K^{-1}}$.