Answer to Question #149173 in General Chemistry for avery

Question

if 7g of water is at 10oC, and a copper block at 113oC is added to it, and the final temperature of the mixture is 54oC, what is the mass of the copper?

Answer 1

| Q(H₂O) | = | Q(Cu) |

T_end (H₂O) = T_end (Сu) = 54 ⁰C

c(H₂O)*m(H₂O)*T(H₂O) = c(Cu)*m(Cu)*T(Cu)

4.18J/[g*K] * 7g * |10-54|⁰C = 0.385J/[g*K] * m(Cu) * |113-54|⁰C

1287.44 = 22.7m(Cu)

m(Cu) = 56.7 g