THERMOCHEMISTRY (STUFF YOU DONT KNOW)

Question 1

What is the formula for calculating enthalpy change?

Answer 1

ΔᵣH = nᵣH

• ΔᵣH = enthalpy change in kJ (or J)
• n = number of moles in mol
• ᵣH = molar enthalpy in kJ/mol or J/mol

Question 2

What is the formula for temperature change?

Answer 2

Q=mcΔt

Q= Quantity of thermal energy (J)
m= mass (g)
c = specific heat capacity (J/g*°C)
Δt = temperature change (°C)

Question 3

What is the formula for standard heats of formation?

Answer 3

Question 4

What are all the ways that ΔH can be measured?

Answer 4

• using heats of formation
• using temperature change formula
• using enthalpy change formula