An automobile engine provides 567 Joules of work to push the pistons. In this process the internal energy changes by –2769 Joules. Calculate  for the engine. This represents the amount of heat that must be carried away by the cooling system.

Consider the following cyclic process carried out in two steps on a gas. Step 1: Step 2: 48 J of heat is added to the gas, and 12 J of expansion work is performed. 66 J of heat is removed from the gas as the gas is compressed back to the initial state. Calculate the work for the gas compression in Step 2. J

Calculate the energy required to heat 249.0 g of aluminum from -3.2 °C to 6.9 °C. Assume the specific heat capacity of aluminum under these conditions is - 1 -1 0.903 J'g K '. Round your answer to 3 significant digits. Ox10

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