ENERGETICS_Part_1_AHL(MAH) Opp

ENERGETICS_Part_1_AHL(MAH) Opp - 100s of free ppts from...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
100’s of free ppt’s from www.pptpoint.com library
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Topic 15: Energetics AHL Part 1 15.1 Standard Enthalpy Changes of Reaction (1.5h) 15.1.1 Define and apply the terms standard state, standard enthalpy change of formation ∆H f Θ and standard enthalpy change of combustion ∆H c Θ 15.1.2 Determine the enthalpy change of a reaction using standard enthalpy changes of formation and combustion
Background image of page 2
Learning check What are the three standard conditions? What is the standard state of bromine? What is the standard state of silicon? What is the standard state of oxygen? The standard enthalpy change of formation ∆H f Θ of a compound is defined as the amount of energy exchanged with the surroundings when 1 mole of the compound is formed from its elements in their standard states under standard condition .
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Write chemical equations for the following reactions – which have ∆H f Θ as their enthalpy change – including all state symbols The formation of sodium chloride The formation of magnesium oxide The formation of methane The formation of sulphur dioxide. The formation of carbon dioxide
Background image of page 4
ΔH c θ The standard enthalpy change of combustion ∆H c Θ is defined as the amount of energy given to the surroundings when 1 mole of a compound undergoes complete combustion
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Write chemical equations for the following reactions – which have ∆H c Θ as their enthalpy change – including all state symbols. The combustion of methane The combustion of graphite The combustion of ethanol Extension: Which chemical equation shows both the enthalpy change of formation of a compound and the enthalpy change of combustion of an element?
Background image of page 6
HESS’S LAW According to the German scientist Hess, the total enthalpy change for a chemical reaction is independent of the route by which the reaction takes place. Explain why Hess’s Law is just a specific case of the Law of Conservation of Energy. Use Hess’s Law to answer the following question
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/17/2011 for the course PHYS 121 taught by Professor Burgeson during the Fall '11 term at BYU.

Page1 / 21

ENERGETICS_Part_1_AHL(MAH) Opp - 100s of free ppts from...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online