Chapter 6, Problem 52E

Consider the following reaction:

${\text{CH}}_4\left(g\right)+2{\text{O}}_2\left(g\right)\to {\text{CO}}_2\left(g\right)+2{\text{H}}_2\text{O}\left(l\right)\Delta H=-891\text{KJ}$

Calculate the enthalpy change for each of the following cases:

a. 1.00 g methane ics burned in excess oxygen.

b. 1.00 × 10³ L methane gas at 740. torr and 25ºC are burned in excess oxygen. The density of CH₄(g) at these conditions is 0.639 g/L.