- #1

Northbysouth

- 249

- 2

## Homework Statement

The following table gives data, in KJ, for a system undergoing a power cycle consisting of four processes in series. Determine the a) missing table entries, each in KJ, and b) the thermal efficiency.

I have attached an image of the Table.

## Homework Equations

Q = (E

_{2}-E

_{1}) + W

Q = ΔE + W

## The Attempt at a Solution

I'm unsure whether a previous process affects the process that comes after it. Is it sufficient to use the formula that I've given to calculate the ΔE and W for processes 1-2, 3-4 and 4-1? If so, then how do I find the ΔE and W for process 2-3? Do I need to look at the process preceding it?

Would I be right in saying that:

W = 1200 for proces 1-2

ΔE = 0 for process 3-4

Q = 1000 for process 4-1