Part b calculate the enthalpy change, δh∘, for the "expansion" of methane: ch4 (g) →c (g) + 4h (g) express your answer to one decimal place and include the appropriate units.

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Cyrus

Chemistry

27 November, 03:19

Part b calculate the enthalpy change, δh∘, for the "expansion" of methane: ch4 (g) →c (g) + 4h (g) express your answer to one decimal place and include the appropriate units.

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Mike Reese · Answer 1

This equation essentially states that the standard enthalpy change of formation is equal to the sum of the standard enthalpies of formation of the products minus the sum of the standard enthalpies of formation of the reactants. and the standard enthalpy of formation values:δH fo[A] = 433 KJ/mol. δ H fo[B] = - 256 KJ/mol. CH4 (g) - > C (g) + 4H (g) Î"Hâ / Î'hâ = 1.665 MJ = 1665 KJ