Question

7. A block of copper of unknown mass has an initial temperature of 65.4oC. The copper is immersed in a beaker containing 95.7g of water at 22.7oC. When the two substances reach thermal equilibrium, the final temperature is 24.2oC. What is the mass of the copper block?

Answer 1

37.34372 kg

Step-by-step explanation:

m = Mass

`\Delta T` = Change in temperature

1 denotes water

2 denotes copper

c = Heat capacity

Heat is given by

`Q=mc\Delta T`

In this case the heat transfer will be equal

`m_1c_1\Delta T_1=m_2c_2\Delta T_2\\\Rightarrow m_2=(m_1c_1\Delta T_1)/(c_2\Delta T_2)\\\Rightarrow m_2=(95.7* 4.18(24.2-22.7))/(0.39(65.4-24.2))\\\Rightarrow m_2=37.34372\ kg`

Mass of copper block is 37.34372 kg