A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 71 J of heat while 38 J of work is done on it. Step 2: The system absorbs 38 J of heat while performing 71 J of work. Calculate ΔE for the overall process.

An 80.0 g sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and its internal energy increased by 9095 J. What is the specific heat of the gas?

Copper has been used for thousands of years, either as a pure metal or in alloys. It is frequently used today in the production of wires and cables. Copper can be obtained through smelting or recycling. Determine the energy associated with each of these processes in order to recycle 1.40 mol Cu. The smelting of copper occurs by the balanced chemical equation: CuO(s) +CO(g) → Cu(s) +CO,(g) where AHtCuo is = - 155 kJ/mol. Assume the process of recycling copper is simplified to just the melting of the solid Cu starting at 25°C. The melting point of Cu is 1084.5°C with AH®fus = 13.0 kJ/mol and a molar heat capacity, CPCU = 24.5 J/mol:°C.

A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 71 J of heat while 35 J of work is done on it. Step 2: The system absorbs 35 J of heat while performing 71 J of work. Calculate ΔE for the overall process. ΔE = _____J

A piston assembly (system) is warmed by an external flame.  The contents of the cylinder expand, pushing the piston outward against the external pressure.  If the piston system absorbs 7100J of heat and does 693J of work, what is the value of ΔE?

As a system increases in volume, it absorbs 55.0 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.540 atm. The final volume of the system is 58.2 L. What was the initial volume of the system if the internal energy of the system decreased by 103.4 J?

A change in a system occurs such that 31.1 J of work is done by the surroundings and 22.4 J of heat flows from the system to the surroundings. What is the change in internal energy of the system?

A balloon filled with gas is compressed under an external pressure of 3.0 atm from 4.0 L to 1.0 L. How much work (in Joules) is transferred during the compression? 1 Latm= 101.325J

In a certain process, 400 J of heat is added to a system and the system simultaneously does 100 J of work. The change in internal energy of the system is 500 J 400 J 300 J -100 J -300 J

A system does 501 kJ of work and loses 216 kJ of heat to the surroundings. What is the change in internal energy, AE, of the system? Note that internal energy is symbolized as AU in some sources. AE = kJ