Question

Review Constants q ual to All of the products You do not need to look up ay values to answer this question The standard heat of formation, defined as the enthalpy change for the formation of one mole of substance from its constituent elements in their standard States. Thus, elements in their standard states have AN 0 . Heat of formation values can be used to calculate the enthalpy change of any reaction For which of the following reactions is A Check all that apply View Available Hits) Consider, for example, the reaction 2NO(x) +0,(£) - 2NO, () with heat of formation values given by the following table All Substance (kJ/mol Cl.graphite) +0,(6)-100,(E) Ll(s) + F() -LF(s) Li(s) + F(1)--LIF(6) CO(g) +0(8) - CO() BC0,() - Ba(s) +CO,(6) 21()+F, (*) - 2LF() NOR) 0.2 0,() NO, () 0 332 Then the standard heat of reaction for the overall reaction is AN...- AN products) - AN(reactants) 2(33.2) - 2(90.2) + 0 -114 kJ Submit

Answer 1

for delta Horxn to be delta Hof,

rule 1: there must be only 1 mol of product being formed

rule 2: reactant must be element in there standard state

Option 1:

This is correct

Option 2:

This is correct

Option 3:

This is wrong.

Standard state of Fluorine is F2(g)

Option 4:

This is wrong.

CO is a compound in reactant

Option 5:

This is wrong.

BaCO3 is a compound in reactant

Option 6:

This is wrong.

2 mol of product is being formed

Answer: option 1 and 2