What Are the Cp and Cv Values for Petrol and Air?

[chhitiz]

what are the C_p and C_v values of petrol and air?

 

[mgb_phys]

http://www.engineeringtoolbox.com/specific-heat-fluids-d_151.html

 

[xxChrisxx]

Use gamma = 1.3 for the polytropic constant.

Note: If you aren't using the cp and cv values to find this, ignore the above. If you are congratulate me for being clairvoyant.
EDIT: It also depends on the blend of petrol and the fuel to air ratio (if you want to get technical and accurate)

 

[chhitiz]

Gee thanks! but that's only the C_p value. what about the C_v value?
and yes i have to calculate specific heat ratio