calculate the work done in a moving a charge of 4 coulombs from a point 22, volts to another point at 230 volts
Q = 4C
Potential difference= V1 - V2 => 230-22 => 208V
W = VQ
Work Done = 832Joule.
18. Which of the following reactions show evolution 19. Name 2 metals which at tarnished. Why does this happen? 20. Why is corrosion harmful? 21. Mention three situations in daily life where a chemical change occurs. 22. Balance the following chemical equations. 23. Write chemical equations for the following word equations: a. Hydrogen + Chlorine Hydrogen Chloride b. Sodium + Water Sodium...