# Question #faee7

##### 1 Answer

The gas that undergoes combustion *produces* **2428 J** of heat, which implies that *negative.*

Likewise, work *done by the system* means that work was performed by the gas on the surroundings, which once again implies a minus sign.

Because the gas burns at *constant pressure*, the heat given off will also be the enthalpy change,

Convert J to kJ to get

Since you're dealing with **1 mole**, you can write

Now use this equation to determine

**SIDE NOTE** *I'll leave the rounding to the correct number of sig figs to you*.