Answer to Question #144241 in General Chemistry for Sintong Hutabarat

Question

A sheet of gold with a weight of 10.0 g and a temperature of 18.0 ° C is placed on a sheet of iron with a weight of 20.0 g and a temperature of 55.6 ° C. What is the final temperature of the two metals? Assume no no heat that is lost to the environment. (Hint: the heat absorbed by gold must be proportional to the heat given off by iron. Specific heat of gold = 0.129 J g -1 ° C; iron = 0.444 J g -1 ° C)

Answer 1

Two q's to 0.

(10.0 Au)(0.129)(Tf-18.0°C) + (20.0g Fe)(0.444)(Tf-55.6°C)=0

(1.29Tf-23.22) + (8.88Tf-502.608) = 0

10.17Tf = 525.828

Temperature final = 51.70°C