Question

The heat transfer necessary to raise the temperature of a constant volume closed system is given by Q-AU. Using the SL model, compare the heat necessary to raise the temperature by 10 °C for such a system of 2 kg and composed of (a) gold, (b) iron. (c) sand, and (d) granite. Part A Gold Express the heat in kilojoules to three significant figures. 160 Ad Ove * * O 3 ? Q- 73014 Submit Previous Answers Request Answer X Incorrect, Try Again; 2 attempts remaining Part B Iron Express the heat in kilojoules to two significant figures. Submit Request Ama Request Answer Part C Sand Express the heat in kilojoules to one significant figure. 0 AED 1 vec O ? Submit Request Answer Part D Granite Express the heat in kilojoules to four significant figures. V AED vec O ?

Answer 1

a) Q = meat (Gold) for gold ca = 0.129 kJ/kg K Q = (2 kallo. 129 kilk.K) (10) Q = Iron, b) 2.580 kJ. C = 0.448 kJ kq . K. Q = (2)(0.4481(10) Q = 0.960 kJ. C) Sand, d) Granite c = 0.742 kJ lkgok Q = (2) (0.742) (10) - - 1.484x 10 kJ. Co od kolky. K. Qc (2) (0.0) (10) S7604702_15,