Worksheets3.2.1.e Enthalpy Changes quiz
Total questions: 8
Worksheet time: 5mins
Identify the standard conditions that enthalpy changes are measured under?
25oC & 1 Bar
290K & 101KPa
298K & 100KPa
298oC & 1 atm
A student calculates the energy
change of a reaction
ΔH = Hproducts - Hreactants , ΔH = 200 – 400 = - 200.
Complete the sentence : This is a negative enthalpy. This means the chemicals have ........ energy
taken energy in
lost energy to air
created energy in the reaction
given energy out
A student calculates the energy
change of a reaction
ΔH = Hproducts - Hreactants , ΔH = 200 – 400 = - 200.
Complete the sentences: This will make the reaction .........
endothermic
exothermic
A student calculates the energy
change of a reaction
ΔH = Hproducts - Hreactants , ΔH = 200 – 400 = - 200.
Complete the sentences: This means that the temperature of the surroundings will
decrease
stay the same
increase
Choose an energy profile diagram for this reaction, that represents the energy change in the reaction
ΔH = Hproducts - Hreactants
= 200 – 400
= - 200
Calculate the ΔH of a reaction where H products = 550 & H reactants = 300.
(a)
Choose an energy profile diagram for this reaction, that represents the energy change in the reaction where
ΔH of a reaction where Hproducts = 550 & Hreactants = 300.
For the reaction where Hproducts = 550 & Hreactants = 300 Decide whether the reaction is endothermic or exothermic.
endothermic
exothermic
