Enthalpy Change

Question 1

What is enthalpy

Answer 1

H : Is a messure of hear energy in a chemcial system. (the chemical system refures to the atoms, moleculee, or ions makeing up the chemicals

Question 2

How to calucalte enthalpy change

Answer 2

∆H = H(products) - H(reactants)

Question 3

What is conservation of energy

Answer 3

Energy cannot be created or destroyed

Question 4

Brakeing bonds =
Makeing bonds =

Answer 4

Brakeing = endothermic
Makeing = exothermic

Question 5

Directions of energy transfer: exothermic

Answer 5

∆H is negetive

Chemical system loses energy

Surroundings gain energy

Tempreture of surroundings increase

Question 6

Directions of energy transfer: endothermic

Answer 6

∆H is posistive

Chemical systems gain energy

Surroundings lose energy

Tempreture of surroundings decreases

Question 7

In a reaction profile graph, explain possition of products n reactants in exo and endo

Answer 7

Exo: reactants above products

Endo: reactants below products