a) estimate the gas phase enthalpy using the bond dissociation enthalpies provid

Question

a) estimate the gas phase enthalpy using the bond dissociation enthalpies provided. b) is the reaction exothermic or endothermic? c) is the reaction likely to proceed spontaneously in the direction written?

For the reaction below: H,C-CH3 12 2 HJC a. Estimate the gas phase enthalpy change using bond dissociation enthalpies from the ow Tabl then click the Tables link on the drop-down that appears. Include algebraic sign and units. 315 b. Is the reaction exothermic or endothermic? endo v c. Is the reaction likely to proceed spontaneously in the direction written? no An error has been detected in your answer. Check for typos, miscalculations etc. before submitting your answer 9 more group attempts remaining Retry Entire Group

Explanation / Answer

For the given reaction,

a. dHrxn = dHreactant) - (dH(products)

               = 2 x 238 - (377 + 151)

               = -52 kJ/mol

b. reaction has -ve dHrxn so it is exothermic reaction

c. The reaction is spontaneous as written.

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