9.2 - Measuring enthalpy changes Flashcards by Melinda kumbala

Q

What is the equation used to calculate energy change?

A

q = m x c x ΔT
mass in g
c is shc = 4.18
ΔT in celsius

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Q

How to calculate ΔHc?

A

energy(q) divided by moles

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Q

Why might the data book combustion enthalpy value differ from the experimental value? (3)

A

Heat lost to surroundings
Incomplete combustion
Non-standard conditions

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