Introducing enthaply and enthaply change

Question 1

What is the enthaply change

Answer 1

is the heat energy change betwwen surroundings and system measured at constant pressure

Question 2

What are the two componenets of chemical energy

Answer 2

Kintic energy, which is measure dof the motion of particles

Potenetial energy, measured of how strong particles interact with each other

Question 3

What is heat energy

Answer 3

Portion of potential enrgy and kinetic energ of a substance which causes temperature of a substance.

Question 4

What is exothermic and give examples

Answer 4

Heat is relased to surroundings etc. Combustion and freezing water

Question 5

What is endotheric and give examples

Answer 5

Heta is taken in from surroundings etc. Phtosynthesis and Melting ice

Question 6

What is the standard enthaply of reaction

Answer 6

enthaply change measured at 100KPa and at a temperature of 298K

Question 7

How can endothermic and exothermic be spotted in reaction

Answer 7

Exothermic is imdiate increase in temperature and answer is +Kjmol-1

Endothermic reaction is decrease in temperature forming -Kjmol-1