The initial internal energy of a mug of coffee is known to be 168 btu. the initial coffee temperature is approximately 200 f. the room temperature is 70 f. time passes and the final amount of internal energy in the coffee is 68 btu. how much heat flowed from the coffee to the room?

To design a steam turbine to produce 12,000 hp power. a engineer comsiders using a steady state stean low st 1160fr and engineer considers using a steady state steam flow at 1160°r and 450 psia to drive this steam turbine. the exhaust of the steam is cooled by the lake (vacuum). heat losing to the surroundings is measured at a rate of 555.55 btu/s. (a) sketch the system with the given conditions. (b) neglecting kinetic and potential energy changes from inlet to exit, determine the volumetric flow rate of the steam at the inlet, (ft'/hr). must clearly show unit conversions at crtical terms.