Okay so, I am in a dilemma. The question is: A sample of copper was heated to 120oC and then thrust into 200 g of water at 25.00oC. The temperature of the mixture became 26.50oC.
1. How much heat in joules was absorbed by the water? (q=1.25 kJ)
2. The copper sample lost how many joules? (Copper lost 1.25 kJ)
3. What was the mass in grams of the copper sample? (m = 34.8 g)
For my c value, I simply subtract 120 by 26.5 to get -93.5. Then I convert 200g into kg which is 0.2Kg for my m. I already know the heat capacity is 4.18 (cuz its water). Somehow I keep getting the question wrong, even though I'm simply plugging in these numbers into the Q=mc T formula. What am I doing wrong?