Figure 1.01a: (a.)The surface of a single grain of table salt.

CRS Question, 6–5

QUESTION

The combustion of a fuel is an exothermic process. This means…

1. the surroundings have lost exactly the amount of energy gained by the system.

2. the potential energy of the chemical bonds in the products should be less than the potential energy of the chemical bonds in the reactants.

3. q must be positive; w must be negative

4. DE would have a + overall value because the surroundings have gained energy.