Two chemical processes are outlined below. • In the combustion of ethanol, energy is .....1..... . • In the electrolysis of aqueous sodium chloride, energy is .....2..... . Which words should be used to fill gaps 1 and 2?
- A1 given out, 2 given out
- B1 given out, 2 taken in
- C1 taken in, 2 given out
- D1 taken in, 2 taken in