Physics

Problem

0.10\,\text{kg}

copper block (

c = 390\,\text{J\,kg}^{-1}\!\text{K}^{-1}

) at

450\,\text{K}

is dropped into

0.20\,\text{kg}

of water at

300\,\text{K}

contained in a

0.05\,\text{kg}

aluminum calorimeter (

c = 900\,\text{J\,kg}^{-1}\!\text{K}^{-1}

). The system is well insulated from the surroundings. After equilibrium is reached, the entire block–water–calorimeter system is quickly transferred (with no energy loss) into

0.50\,\text{kg}

of oil at

310\,\text{K}

in a second perfectly insulated vessel. The specific heat of the oil is

2000\,\text{J\,kg}^{-1}\!\text{K}^{-1}

. What is the final common temperature of all components? a)

310\,\text{K}

312\,\text{K}

308\,\text{K}

307\,\text{K}

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