In an aluminum calorimeter, in which there was water weighing 200 g at a temperature of 10 ° C

In an aluminum calorimeter, in which there was water weighing 200 g at a temperature of 10 ° C, a copper bar weighing 150 g was placed, the temperature of which was 100 ° C. Determine the temperature of the water after thermal equilibrium has been established.

In this experiment, a copper bar gives off heat, and water receives. The end temperature is set between 10 ° and 100 °;

Q given = c (copper) * m (bar) * (100 – t end);

Q obtained = c (water) * m (water) * (t end – 10);

Q given = Q received;

c (copper) * m (bar) * (100 – t end) = s (water) * m (water) * (t end – 10);

400 * 0.15 * (100 – t end) = 4200 * 0.2 * (t end – 10);

6000 – 60tend = 840tend – 8400;

14400 = 900 end

tfinal = 16о

Answer: 16o.