A copper piece heated to 720 ° C was immersed in 1.75 g of water at a temperature of 18 ° C. all the water was heated
| November 27, 2020 | education
A copper piece heated to 720 ° C was immersed in 1.75 g of water at a temperature of 18 ° C. all the water was heated up to 100 ° С and 75 g of it turned into steam. Determine the mass of the part. Neglect energy loss.
Decision:
Q = Q1 + Q2
Q1 = 4200 * 1.75 * 88 = 646.8 kJ
Q2 = 2260 * 0.075 = 169.5 J
Q = 646969.5 J
646969.5 = 400 * mmed.child. * 620
mcopper children approx = 2.6kg
Answer: 2.6 kg
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