ENERGETICS

Question 1

What are the two types of reactions?

Answer 1

Exothermic Reaction : Heat is given out, energy of reactants is greater than energy of products. Temp of surrounding increases.
Endothermic Reaction: Heat is absorbed, Energy of products is more than energy of reactants. Temp of surrounding decreases.

Question 2

What are some examples of endothermic reactions?

Answer 2

1) Photosynthesis
2) Thermal Decomposition
3) Solid to Liquid to Gas
4) acid+ Bicabronate reaction
5) Dissolving of some salts

Question 3

What are examples of some exothermic reactions?

Answer 3

1) Neutralization Reactions
2) Combustion/Burning
3) Respiration
4) Haber Process
5) Contact Process
6) Gas to liquid to solid

Question 4

What is Enthalpy Change?

Answer 4

Heat change under certain conditions of temperature and pressure

Question 5

What is standard enthalpy change?

Answer 5

Enthalpy change under standard conditions of 298K and 1ATM

Question 6

What is the energy of elements in their standard state?

Answer 6

0

Question 7

What is the standard enthalpy change of formation?

Answer 7

It is the enthalpy change when 1 mol of a compound is formed from constituent elements of that compound under standard conditions.

Question 8

What is standard energy change of combustion?

Answer 8

It is the enthalpy change, when 1 mol of substance completely combusts in excess of O2 under standard conditions.