Relating Heat and Work to Changes of Internal EnergyGases
Chapter 3, Problem 2PE(choose chapter or problem)
Problem 2PE
Relating Heat and Work to Changes of Internal Energy
Gases A(g) and B(g) are confined in a cylinder-and-piston arrangement like that in Figure and react to form a solid product C(s): A(g) + B(g)→C(s). As the reaction occurs, the system loses 1150 J of heat to the surroundings. The piston moves downward as the gases react to form a solid. As the volume of the gas decreases under the constant pressure of the atmosphere, the surroundings do 480 J of work on the system. What is the change in the internal energy of the system?
Calculate the change in the internal energy for a process in which a system absorbs 140 J of heat from the surroundings and does 85 J of work on the surroundings.
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