Question

om more resistant to temperature changes, and the heat capacities of oils can vary more widely Part D A 1.5 kg block of iron at 25°C is rapidly heated by a torch such that 12 kJ is transferred to it. What temperature would the block of iron reach (assuming the complete transfer of heat and no loss to the surroundings)? If that same amount of heat (12 kJ) was quickly transferred to a 830 g pellet of copper at 25°C what temperature would the copper reach before it begins losing heat to the surroundings? Use the equation for heat capacity and the following heat capacity values: MAT Pe) = 0.450 J/( C) Suw) - 0.385 J/( C) to two significant figures separated by a comma. Express the final temperatures of the Iron and copper in View Avaliable Hints) O AXO O sa ? Final temperatures of Fe, Cu Submit < Return to Assignment Provide Feedback

Answer 1

yon Heat Absorbed by Icon= l2kJ Heat Absorbed by Iron=mX (fex alpe mass or Iron Block = 1.5kg = 1500g=mpe fer 5 0.45 J/g °C Ato Change in temperature= T-25°C where IT is final Temperature of Iron. 12000 = 5 045 X (1-25)X1500 17.78=T-25 179_42.78 °C 7 Teacher's Signatura'

Heat Absorbed by Copperz 120005 Eu= 0.385J/g °C m= 830g 1. Cu osog Let T be Final Temperature. so Atom T-25°C m X CX AT = 120005 cu cu cu 830 X 0.385 *CT-25) 21200 T, -25= 37-55 IT = 62.55°c 7 It Expressed in two significant figures, T= 43°C (aster Rounding 360) T= 63°C (atter Rounding out)