B. How much energy is required to heat 2 kg of water through the following changes? Use values from latent heat and specific heat constant tables when necessary. Show your work. (10 points) i. Heat 2 kg ice from –5°C to 0°C (2 points)

ii. Melt 2 kg ice at 0°C (2 points)

iii. Heat 2 kg water from 0°C to 100°C (2 points)

iv. Vaporize 2 kg water at 100°C (2 points)

v. Heat 2 kg steam from 100°C to 115°C (2 points)

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.