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Chemistry > Thermodynamics > Flashcards

Thermodynamics Flashcards

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1
Q

Define enthalpy of combustion

A

Enthalpy change when one mole of a substance is completely burned in oxygen under standard conditions (298K and 100KPa)

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2
Q

What is Hess’ law?

A

The enthalpy change in a reaction is independent of the route taken

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3
Q

Why might the enthalpy value calculated be different to that in a textbook?

A
  • heat is lost to surroundings

* incomplete reaction

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4
Q

Define bond enthalpy

A

Average enthalpy change needed to break a covalent bond

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5
Q

Why are bond enthalpies not always accurate?

A

average values from a range of compounds

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Chemistry (22 decks)

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