If you are told the initial and final states of a system and the associated change in internal energy, can you determine whether the internal energy change was due to work or to heat transfer? Explain.
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If you are told the initial and final states of a system and the
associated
change in internal energy, can you determine whether the
internal
energy change was due to work or to heat transfer? Explain.
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- 1. Given that U is a function of T and V, That is U(T,V), derive the following expression from first principle P]av dU = CydT + dV - Where U is the internal energy of the system, and all other variables have the usual meaning.800 J of work are done BY a system in a process that decreases the thermal energy of the system by 50 J. How much heat is transferred TO the system during this process? If the system gains heat, answer with a positive number. If the system loses heat, answer with a negative number. (in J) -750 750 -850 -50 01. Given that U is a function of T and V, That is U(T,V), derive the following expression from first principle du = G,dT + [r (), - P]av Where U is the internal energy of the system, and all other variables have the usual meaning.
- A heat engine operates between a hot reservoir at 500°C and a cold reservoir at 25°C. It has an efficiency of 40%. Calculate the amount of heat absorbed from the hot reservoir when the engine expels 1500 J of heat to the cold reservoir.In the following situations, find the change in the internal energy of the system. a) A system absorbs 450 J of heat, and at the same time does 210 J of work. b) 750 J of heat is removed from a gas that is held at constant volume.C. Solve the problem with complete solution 1. The internal energy of a system is initially 25J. The system does 24J of work. What is the system's final internal energy when a total of 36J of emergy is added to the system by heat?
- Heat always flows spontaneously from an object with a higher temperature to an object with a lower temperature. Is this the same thing as saying that heat always flows from an object with a greater internal energy to one with a lower internal energy? Explain.Is it possible to convert internal energy to mechanical energy? Explain with examples.If I bring a small object at temperature 200C in thermal contact with a large object at the same temperature, a) thermal energy will flow from the large to the small object because the large object has more internal energy. b) thermal energy will flow from the small to the large object because that will increase entropy. c) thermal energy will not flow.