Answer to Question #287956 in Electric Circuits for Hab

Question

0.1 kg aluminum calorimeter contains 0.2 kg water at 70.6 °C. It is found that the temperature of the calorimeter and water drops to 20°C in 15 minutes. What is the rate of heat flow to the atmosphere?

Answer 1

rate of heat flow to the atmosphere:

$r=\Delta Q/\Delta t=(m_1C_1+m_2C_2)\Delta T/\Delta t$

where

C₁, C₂ are heat capacities of water and aluminium

$r=\frac{(0.2\cdot4200+0.1\cdot890)(70.6-20)}{15}=3133.83$ J/min