For part (a) calculate the heat lost in calories for copper and lead then calculate the heat gained in calories for the water in each case. Remember that you used 25.0 G of water.
Mass of copper 20.61G
initial temperature of water 21.4°C
initial temperature of metals 98.7°C
Final temperature water for copper and water 26.5°C
Final temperature of water for lead and water 23.1°C
From literature review
4.186 is the specific heat capacity of water.
And also, the conversion factor from joule to calories is
How did you get 0.239?
How do you get 4.186?