The following relations between the two specific heats (i.e. Cp and Cv) are important.

1. The difference of two specific heats is equal to gas constant (R), i.e.

Cp - Cv = R

2. The ratio of two specific heats (i.e. Cp / Cv) is known as adiabatic index and it is represented by a Greek letter gamma (Ɣ).

We Know That Cp - Cv = R

or Cp/Cv = 1 + R/Cv

Ɣ = 1 + R/Cv

Since Cp is always greater than Cv therefore the value of Ɣ is always greater than unity.

1. The difference of two specific heats is equal to gas constant (R), i.e.

Cp - Cv = R

2. The ratio of two specific heats (i.e. Cp / Cv) is known as adiabatic index and it is represented by a Greek letter gamma (Ɣ).

We Know That Cp - Cv = R

or Cp/Cv = 1 + R/Cv

Ɣ = 1 + R/Cv

Since Cp is always greater than Cv therefore the value of Ɣ is always greater than unity.

**Note:**The value of Ɣ for air is 1.4.
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