1. ( from a volume of 0.50 m2 to a volume of 0.25 m2. )An ideal gas undergoes isobaric compression at atmospheric pressure (1.01-10 Pa) (a) If the gas starts off at a temperature of 210K (the temperature of the hot reservoir), what is the temperature of the gas after the compression (the temperature of the cold reservoir)? (b) If the gas is monoatomic and there are 10 moles of gas, how much heat is transferred in the compression in Joules? Is the heat transfer positive or negative? (c) Does the entropy of the gas increase, decrease, or stay the same during this process? Explain. Is this process reversible? (d) How much work is done on the gas in Joules during the compression? Is the work done on the gas positive or negative? (e) What is the change in internal energy of the gas in Joules during the compression? Does the gas gain or lose energy? (f) What is the efficiency of a reversible heat engine operating between the same hot and cold reservoirs?

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First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.