00:01
One way to calculate work is for a gas, work is equal to negative p delta v.
00:11
Delta v or p delta v from the ideal gas law, where p equals nrt, p delta v will be equal to delta n rt, where n is the change in moles of gas.
00:30
So if we have a chemical reaction that produces gas, we've got k -c -l -o -3 solid, going to k -cl -o -3 solid, solid, plus o2, gas.
00:57
To balance this, we're going to need a three - halves here.
01:05
So if we multiply everything through by two, which they did, two, two, and three.
01:13
We're going from zero moles of gas to three moles of gas...