Use the differential form for dv (see Eq 7 7) assuming v RT P and find the change in the specific volume v of air if the pressure and temperature change from 200 kPa and 100 C to 210 kPa and 120 C Compare with v using the ideal gas law directly ...

Using Eq 77 an approximation is Cal ...

Use the differential form for dv (see Eq. 7.7) assuming v = RT/P and find the change

Question:

Use the differential form for dv (see Eq. 7.7) assuming v = RT/P and find the change in the specific volume Δv of air if the pressure and temperature change from 200 kPa and 100° C to 210 kPa and 120° C. Compare with Δv using the ideal-gas law directly.