Bond Enthalpies (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is bond enthalpy?
What is bond enthalpy?
Energy to break one mole of a bond in gas
What is the sign of when breaking bonds?
What is the sign of when breaking bonds?
Positive
What is the sign of when forming bonds?
What is the sign of when forming bonds?
Negative
What is mean bond enthalpy?
What is mean bond enthalpy?
Average energy to break one mole of a bond type
How does bond length relate to bond strength?
How does bond length relate to bond strength?
Shorter bonds are stronger
Which bond type is strongest?
Which bond type is strongest?
Triple bond
What is the formula for using bond enthalpies?
What is the formula for using bond enthalpies?
Bonds broken - bonds formed
For , with H-H = 436, Cl-Cl = 243, H-Cl = 431 kJ/mol, find .
For , with H-H = 436, Cl-Cl = 243, H-Cl = 431 kJ/mol, find .
-183 kJ/mol
Why do mean bond enthalpy calculations differ from Hess' Law?
Why do mean bond enthalpy calculations differ from Hess' Law?
Mean values are averages
Which method is more accurate for enthalpy changes?
Which method is more accurate for enthalpy changes?
Hess' Law with formation data