Question

Help Required ASAP Q9 ,Q10 and Q 11

Problem 1

A gas of nitrogen molecules is at a temperature of 1000K. In this case molecule has 3 translational, 2 rotational, and 2 vibrational degrees of freedom per molecule, i.e. a total of 7.

1.7. The gas undergoes a cyclic process which can be represented by a circle on a PVdiagram. Illustrate graphically the locations of the highest and lowest temperatures in the process.

1.8. Consider a cycle which has a shape of a rectangle whose vertices are defined by V, 2*V, and P, 2*P in the PV-diagram. Find the ratio of the highest and lowest temperatures in the cycle.

1.9. Assuming the cycle operates as an engine, calculate the engine efficiency.

1.10. If you are to build the most efficient engine using the highest and the lowest temperatures available from #9 how would the cycle look like on a PV-diagram [you need to indicate both cycles]

1.11 What is the efficiency of the most efficient cycle in 1.10?

Answer 1