Energy Changes

1234567891011121314
Across
  1. 5. A use of exothermic reactions in the food industry.
  2. 9. What element is oxidised in a fuel cell, where the waste product is water.
  3. 10. The energy needed to start a reaction is called this.
  4. 11. What do metals lose to form positive ions?
  5. 13. These fuels are non-renewable and cause pollution.
  6. 14. In an exothermic reaction, the energy released when new bonds are formed is ******* than the energy absorbed when bonds are broken.
Down
  1. 1. Name the other gas required to operate a hydrogen fuel cell.
  2. 2. In an electrical cell made from zinc & copper, which metal acts as the negative terminal?
  3. 3. Energy required to break bonds is called this.
  4. 4. This is made up of two or more cells joined together in a series to provide a greater voltage.
  5. 6. Thermal decomposition reactions are an example of this.
  6. 7. What is the name for a solution that conducts electricity?
  7. 8. Endothermic changes can be used in instant cold packs for sports injuries. Name the solid that is usually used to dissolve in water?
  8. 12. The term for reactions which transfer energy from reactants to their surroundings