Q6 KSS Energy from petrol is used to operate an engine. The engine drives a generator, which produces
electrical energy.
energy from
petrol
work done
by engine
electrical
energy
engine
generator
400 J
120 J
100 J
What is the overall efficiency of the process?
А
25 %
XB
30 %
C 55%
XD
83 %

freezing

deposition

condensation

explanation;

melting also called fusion is the process where solid becomes liquid, sublimation is the process where solid becomes gaseous without first changing to liquid, deposition involves change from gaseous to solid state, freezing involves change from liquid to solid, boiling or evaporation involves change of liquid to gaseous state, while condensation is the change from gaseous state to liquid state.

endothermic reactions involves absorption of heat from the surroundings or the environment while exothermic reactions involves loss of heat energy to the surroundings.

in this case, sublimation, evaporation and melting are endothermic reactions (gain energy from the environment) while, freezing, deposition and condensation are exothermic (loss of energy to the surroundings) reactions.

15.3 cos 65 degrees trig

gas and liquid