A 27 g block of ice is cooled to −90 ◦C. It
is added to 509 g of water in an 75 g copper
calorimeter at a temperature of 23◦C.Find the final temperature. The specific
heat of copper is 387 J/kg ·
◦C and of ice is
2090 J/kg ·
◦C . The latent heat of fusion of
water is 3.33 × 105
J/kg and its specific heat
is 4186 J/kg ·
◦C .
Answer in units of ◦C.