Question

5. To determine whether a shiny gold-colored rock is actually gold, a chemistry student decides to measure its heat capacity. She first weighs the rock and finds it has a mass of 5.2 g. She then finds that upon absorptions of 59.3 J of heat, the temperature of the rock rises from 23 °C to 59 °C. Find the specific heat of the object and determine if it matches the specific heat of real gold. (c = 0.128 J/g°C)

Answer 1

5. Criven, mans of the rock tm) = 5.28. Temprature difference (ot) = 59°c - 23° 0 = 3600 Heat absorption (9) = 59.3J we know, O q = mx exor (where e specific heat of the => 59.3 J = 5.2g x cx 360 rock) => c= 59.3] - 20.3167 J/g °C 5.2gx 36°C 80, the specific heat of the rock is 0.3167 Jlg e: And it does not matches to the specibie heat of the real gold.