Penentuan Rasio Panas Jenis (Cp/Cv) untuk Gas N2 dan H2

Abstract

The ratio of specific heat capacity, at constant pressure to that at constant volume (clc,), of a gas can be determined by either the adiabatic expansion method or the sound velocity method The objective of this experiment is apply the adiabatic expansion method for determining the specific heat capacity ratio of gas Nz and O2. The result showed that the ratio were 1.14 and 1.19 respectively for gas Nz and O2. The value obtained by the experiment was different about 15 to 19% from the result determined by theoretical method using 5 degree of freedom. Theoretically clc" of both gas N2 and O2 which have 5 degree of freedom are 104. The difference was considered to be caused by the experimental condition, which were not sufficiently adiabatic, as required by the method However, the simplicity of the method and clarity of its theoretical approach is advantageous to be used by students of Advance Thermodynamic class as a practical exercise. KeyWords: specific heat capacity ratio (Cp/Cv), adiabatic expansion method