Thermodynamics Question

1. The problem statement, all variables and given/known data
A system comprising of an ideal gas is taken from State a to State b, as shown in Figure 9 below, along th epath acb. 200J of heat flows into the system and 80J of work is done by the system along the path acb.

1) Find the change in internal energy of the system for the path acb.

2)Suppose the system were taken from State a to State b along the path adb instead. find the work done if 140J of heat flows into the system along this path. Is work done on or by the system

3)If the work done on the gas is 50J for the curved path ba, what is the heat flowing into or out of the system for this path?

4)If the internal energy of the gas at State a is 40J, what is the internal energy of the gas

5) If the internal energy of the gas is 90J at State d, what is the value of the heat flowing into the system along the path ad?

2. Relevant equations
ΔQ = ΔU+ΔW

3. The attempt at a solution
In the posted picture

For Part 2…work is done by the system.

Attached Images
File Type: jpg IMG_20140408_235736.jpg (89.9 KB)
File Type: jpg IMG_20140408_235808.jpg (85.6 KB)

http://ift.tt/1kpuR61

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