thermochemistry

Question 1

exothermic reaction

Answer 1

Chemical reaction that releases heat to the surrounding
Temp of the reaction mixture increases
Heat released for bond formation is higher than heat absorbed for bond breaking

Question 2

Endothermic reactionb

Answer 2

Chemical reaction that absorbed heat from the surrounding
Temp of the reaction mixture decreases
The heat absorbed for bond breaking is higher than heat released for bond formation

Question 3

Heat of precipitation

Answer 3

Energy changes when one mole of precipitate is formed from their ions in aqueous solution

Question 4

Heat of displacement

Answer 4

Energy changes when one mole of metal is being displaced from its salt solution by a more electropositive metal

Question 5

Heat of neutralisation

Answer 5

Heat changes when one mole of water forms between an acid and alkali

Question 6

Heat of combustion

Answer 6

Heat released when one mole of substance burnt completely in excess oxygen

Question 7

Fuel value

Answer 7

Amount of heat energy released when one gram of fuel burnt completely in excess oxygen

Question 8

Factor in selection of fuels

Answer 8

Fuel value
Cost of fuel
Availability and source of substance
Effects of fuels on environment

Question 9

exothermic

Answer 9

chemical reactions that release heat to the surrounding

Question 10

Endothermic

Answer 10

Chemical reaction the absorb heat from the surrounding