A Carnot engine operates between a hot reservoir at 250°C and a cold reservoir at 30°C. If the engine absorbs 500 J of heat from the hot reservoir, how much work does it deliver per cycle? If the same engine were run in reverse as a heat pump, how much heat would be removed from the cooler reservoir per cycle if the work input is 200 J? If the engine were operated as a heat pump between an outside temperature of 0°C and an inside temperature of 22°C, how much heat would be delivered per cycle assuming the same work input as before?

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