Thermodynamics Problem Solving

Thermodynamics Problem Solving-60
This would add heat to the environment which would increase entropy.Hence, the gas cannot be returned to its initial state under the reverse conditions, and the process described in the problem is therefore not reversible. This means that the partial pressure of the water vapor inside the container is equal to the pressure of saturated water vapor (at 20°C).

This would add heat to the environment which would increase entropy.Hence, the gas cannot be returned to its initial state under the reverse conditions, and the process described in the problem is therefore not reversible. This means that the partial pressure of the water vapor inside the container is equal to the pressure of saturated water vapor (at 20°C).

A valve is then opened which allows the gas to expand freely into an insulated container B, which is initially empty.

After the gas has settled, the final conditions of the gas are P.

In thermodynamics, a process is said to be reversible if it produces no entropy.

This means that the process can happen in the reverse direction.

Using the equation above, why would this produce more power output than using non-concentrated solar energy as the heat source, collected over the same area as the dish.

See answer Source: # 4 Steam at a temperature of 350°C and a pressure of 1 MPa is flowing through a pipe. See answer Problem # 5 A vortex tube, also known as a Ranque-Hilsch vortex tube, is a mechanical device without moving parts that separates a compressed gas into hot and cold streams.To return the gas to its original state, it would have to be compressed back into container A.This unavoidably takes place against a resistive pressure force (exerted by the gas), which means that work is required to do so.To make the ride as energy efficient as possible, one can set up an electric motor and regenerative battery system in which energy from the battery is used to drive the electric motor to lift the riders to the top of the ride.As the riders descend down the ride, the "falling" energy is used to recharge the battery.See answer Problem # 3 For all heat engines, the maximum work output (W) is related to the maximum heat input energy (Q) by the following equation: is the temperature of the heat sink, which is the temperature of the "leftover" heat energy after work is extracted from the process. The term inside the brackets represents the thermal efficiency of the process, commonly known as the Carnot efficiency.In an application involving a Stirling engine (a type of heat engine, shown below), a parabolic dish is used to concentrate solar energy onto the receiver of the engine.This would result in a lot of waste heat being generated on an enormous scale, which has the potential of being detectable using telescopes here on earth.Explain how this theory makes sense from a thermodynamics sense, using our civilization as an example.See answer Answers For Thermodynamics Problems Since the containers are insulated, no heat transfer occurs between the gas and the external environment, and since the gas expands freely into container B there is no resistance "pushing" against it, which means no work is done on the gas as it expands.As a result, the internal energy of the gas remains the same, before and after the expansion.

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