During which phase change is heat energy absorbed by a substance?

evaporation

Explanation:

The process of converting a liquid to a gas is called evaporation. 600 cal is needed to convert 1g of water to water vapor at 0 °C or 540 cal at 100 °C.

The thermal energy absorbed by the molecules of a liquid during evaporation is used only to give them the movement needed to escape from the liquid's surface and become a gas. This energy, which is later released as heat when the vapor is liquid again, is called latent heat of vaporization.

gametes or germ cells are haploid cells (example: sperm and ova) containing only one set (or n) number of chromosomes and autosomal or somatic cells are diploid cells containing 2n number of chromosomes.

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1. c 6. b. 11. c

2. a 7. d. 12. d

3. c 8. b. 13. c

4. d 9. c. 14. d

5. c 10. d. 15. a

16. d. 21. a

17. d.

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19. d. your own

20. d.