Methane

Reference data and engineering information about methane for gases and compressed air applications.

methane

Overview

Engineering reference data for Methane in gases and compressed air.

Key Formulas

Ideal Gas Law

$PV = nRT$

Pressure × Volume = moles × gas constant × temperature.

Boyle's Law

$P_1 V_1 = P_2 V_2$

At constant temperature.

Charles's Law

$\frac{V_1}{T_1} = \frac{V_2}{T_2}$

At constant pressure.

Variables

Symbol	Description	Unit
$P$	Pressure	Pa
$V$	Volume	m³
$T$	Temperature	K
$R$	Gas constant	8.314 J/(mol·K)

Methane Gas Specific Heat Data

The specific heat at constant pressure ( $c_p$ ) for methane gas ( $\text{CH}_4$ ) is temperature-dependent. The following table provides measured values for temperatures ranging from 200 K to 1100 K.

23 rows

Specific heat at constant pressure ($c_p$) for methane gas ($\text{CH}_4$).
Temperature(K)	Specific Heat, $c_p$(kJ/kg·K)
200	2.087
225	2.121
250	2.156
275	2.191
300	2.226
325	2.293
350	2.365
375	2.442
400	2.525
450	2.703
500	2.889
550	3.074
600	3.256
650	3.432
700	3.602
750	3.766
800	3.923
850	4.072
900	4.214
950	4.348
1000	4.475
1050	4.595
1100	4.708

Source: engineeringtoolbox.com

Note: The specific heat values vary significantly with temperature. For engineering calculations involving heating or cooling of methane, using temperature-corrected values from this table improves accuracy over using a single constant value.