heat of reaction equations
DESCRIPTION
Heat of reaction equations. Using simultaneous equations. Simultaneous equations. GIVEN: Δ H A + B = C-50 D + E = F+24 F + C = H???. Simultaneous equations. GIVEN: Δ H A + B = C-50 D + E = F+24 F + C = A+ B + C + D???. Simultaneous equations. - PowerPoint PPT PresentationTRANSCRIPT
Heat of reaction equations
Using simultaneous equations
Simultaneous equations
GIVEN: ΔHA + B = C -50D + E = F +24F + C = H ???
Simultaneous equations
GIVEN: ΔHA + B = C -50D + E = F +24F + C = A+ B + C + D ???
Simultaneous equations
GIVEN: ΔHA + B = C -50D + E = F +24A+ B + E + D= H -26
INTERPRETING DATA
INTERPRETING DATA
INTERPRETING DATA
INTERPRETING DATA
Using this to solve an unknown reaction
2009 Q6(e) The combustion of Butene C4H8 is described by the following balanced
equation.C4H8 + 6O2 4CO2 + 4H2O
ΔH = –2710 kJ mol–1
The standard heats of formation of water and carbon dioxide are –286 and –394 kJ
mol–1, respectively.Calculate the heat of formation of C4H8
What have we been told??
2009 Q6(e) The combustion of Butene C4H8 is described by the following balanced
equation.
• C4H8 + 6O2 4CO2 + 4H2O
ΔH = –2710 kJ mol–1
This is the energy given out when butene is burned in oxygen
What have we been told??
2009 Q6(e) The combustion of one of Butene C4H8 is
described by the following balanced equation.
C4H8 + 6O2 4CO2 + 4H2OΔH = –2710 kJ mol–1
The standard heats of formation of water and carbon dioxide are –286 and –394 kJ mol–1,
respectively.Calculate the heat of formation of C4H8
What have we been told??
The standard heats of formation of water and carbon dioxide are –286
and –394 kJ mol–1, respectively.ΔH = kJ mol–1
H2 + ½O2 H2O -286
C + O2 CO2 -394
What do we need to know?
4C + 4H2 C4H8 ΔH = ???
Using all the given info one has to manipulate the given formulas to
leave the needed one.
The question seeks to answer if the formation of butene is exothermic or endothermic
What’s next?
Write down all the info you have.
ΔH = kJ mol–1
H2 + ½O2 H2O -286
C + O2 CO2 -394
C4H8 + 6O2 4CO2 + 4H2O –2710
What’s next?
Write down all the info you have.
ΔH = kJ mol–1
H2 + ½O2 H2O -286
C + O2 CO2 -394
C4H8 + 6O2 4CO2 + 4H2O –2710 4C + 4H2 C4H8 ΔH = ???
What’s next?
ΔH = kJ mol–1
H2 + ½O2 H2O -286
C + O2 CO2 -394
C4H8 + 6O2 4CO2 + 4H2O –2710 4C + 4H2 C4H8 ΔH = ???
What’s next?
ΔH = kJ mol–1
H2 + ½O2 H2O -286
C + O2 CO2 -394
C4H8 + 6O2 4CO2 + 4H2O –2710
4CO2 + 4H2O C4H8 + 6O2 2710
4C + 4H2 C4H8 ΔH = ???4C + 4H2 C4H8 ΔH = ???reverse
What’s next?
ΔH = kJ mol–1
H2 + ½O2 H2O -286
C + O2 CO2 -394
C4H8 + 6O2 4CO2 + 4H2O –2710
4CO2 + 4H2O C4H8 + 6O2 2710
4C + 4O2 4CO2 -1576
4C + 4H2 C4H8 ΔH = ???x4x4
What’s next?
ΔH = kJ mol–1
H2 + ½O2 H2O -286
C + O2 CO2 -394
C4H8 + 6O2 4CO2 + 4H2O –2710
4CO2 + 4H2O C4H8 + 6O2 2710
4C + 4O2 4CO2 -1576
4H2 + 2O2 4H2O -1144
4C + 4H2 C4H8 ΔH = ???x4x4
What’s next?
ΔH = kJ mol–1
4CO2 + 4H2O C4H8 + 6O2 2710
4C + 4O2 4CO2 -1576
4H2 + 2O2 4H2O -1144
4C + 4H2 C4H8 ΔH = ???
What’s next?
4C + 4H2 C4H8 ΔH = ???
What’s next?
4C + 4H2 C4H8 ΔH = ???
What’s next?
4C + 4H2 C4H8 ΔH = ???
What’s next?
4C + 4H2 C4H8 ΔH = ???
What’s next?
4C + 4H2 C4H8 ΔH = ???
What’s next?
4C + 4H2 C4H8 ΔH = ???
What’s next?
4C + 4H2 C4H8 ΔH = ???
What’s next?
4C + 4H2 C4H8 ΔH = ???
What’s next?
4C + 4H2 C4H8 ΔH = ???
What’s next?
4C + 4H2 C4H8 ΔH = ???
What’s next?
4C + 4H2 C4H8 ΔH = ???
What’s next?
4C + 4H2 C4H8 ΔH = ???