Which equation represents the reaction for which the enthalpy change, ∆H, is the meanbond enthalpy of the C–H bond?A ¼CH 4(g) → ¼C(g) + H(g)B CH 4(g) → C(s) + 2H 2 (g)C CH 4(g) → C(g) + 4H(g)D CH 4(g) → C(g) + 2H2 (g)

9 Which equation represents an enthalpy change that is the average bond energy of the C–H bondin methane?A 41 C(g) + H(g)  41 CH4 (g)B 41 CH4 (g)  41 C(g) + H(g)C CH 4 (g)  C(g) + 4H(g)D CH 4 (g)  CH 3 (g) + H(g)

Which reaction shows that the enthalpy of formation of C2H4 is Hf = 52.5 kJ/mol?A.2C(s) + 2H2(g) + 52.5 kJ C2H4B.2C(s) + 4H(g) C2H4 + 52.5 kJC.2C(s) + 2H2(g) C2H4 + 52.5 kJD.2C(s) + H(g) + 52.5 kJ C2H4SUBMITarrow_backPREVIOUS

Which equation represents the average bond enthalpy of the Si−H bond in SiH 4 ?A. SiH 4 (g) → SiH3 (g) + H (g)B. 14 SiH 4 (g) → 14 Si (g) + H (g)C. SiH 4 (g) → SiH3 (g) + 12 H 2 (g)D. SiH 4 (g) → Si (g) + 4H (g)

The equation for an enthalpy change is shown. The enthalpy change is Q.Q2C(s) + 3H 2(g) + 3.5O 2(g) 2CO 2(g) + 3H 2O(l)What is the correct expression to calculate Q?A 2  [CO 2(g)] – 3  [H 2(g)]B 3  [H 2O(g)] + 2  [CO 2(g)]C 2  [CO 2(g)] – 3  [H 2(g)]D 3  [H 2O(l)] + 2  [CO 2(g)]

Consider the gas-phase reaction below.2 H2S(g) + CH4(g) → 4 H2(g) + CS2(g)Which expression can be used to calculate the heat of reaction (ΔH°rxn) for the reaction shown using bond enthalpies (ΔH°bond)?A.ΔH°rxn=(2×ΔH°S—H)+ΔH°C—H−(4×ΔH°H—H)−ΔH°C=S∆𝐻°rxn=2×∆𝐻°S―H+∆𝐻°C―H-4×∆𝐻°H―H-∆𝐻°C=SB.ΔH°rxn=(4×ΔH°S—H)+(4×ΔH°C—H)−(4×ΔH°H—H)−(2×ΔH°C=S)∆𝐻°rxn=4×∆𝐻°S―H+4×∆𝐻°C―H-4×∆𝐻°H―H-2×∆𝐻°C=SC.ΔH°rxn=(4×ΔH°H—H)+(2×ΔH°C=S)−(4×ΔH°S—H)−(4×ΔH°C—H)∆𝐻°rxn=4×∆𝐻°H―H+2×∆𝐻°C=S-4×∆𝐻°S―H-4×∆𝐻°C―HD.ΔH°rxn=(4×ΔH°H—H)+(2×ΔH°C=S)+(4×ΔH°S—H)+(4×ΔH°C—H)∆𝐻°rxn=4×∆𝐻°H―H+2×∆𝐻°C=S+4×∆𝐻°S―H+4×∆𝐻°C―HSubmit