Problem: Find ΔH°f for BF3(g) from the given table.SubstanceΔH°f kJ/molB(g)565.0B(s)0F(g)79.38F2(g)0BF3(g)-1136.0BCl3(g)-403.8B­2H6(g)36.4B2O3(g)-1273.5Express your answer using one decimal place.

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The standard enthalpy of formation (ΔH˚f) refers to the enthalpy change for the formation of 1 mole of a compound from its elements in their standard states.

Given table:

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Problem Details

Find ΔH°f for BF3(g) from the given table.

Substance

ΔH°f kJ/mol

B(g)

565.0

B(s)

0

F(g)

79.38

F2(g)

0

BF3(g)

-1136.0

BCl3(g)

-403.8

2H6(g)

36.4

B2O3(g)

-1273.5


Express your answer using one decimal place.

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