Calculate the standard enthalpy of formation of liquid water
(H2O) using the following thermochemical
information:
2 HNO3(l)
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2 N2(g) + 5
O2(g) ![]() |
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N2(g) + 3
O2(g) + H2(g) ![]() |
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The formation reaction is:
H2(g) + 1/2 O2(g) -> H2O(l)
Let this be reaction 0
Lets number the reaction as 0, 1, 2, 3 from top to bottom
required reaction should be written in terms of other
reaction
This is Hess Law
required reaction can be written as:
reaction 0 = +1 * (reaction 1) -0.5 * (reaction 2) +1 * (reaction
3)
So, ΔHo rxn for required reaction will be:
ΔHo rxn = +1 * ΔHo rxn(reaction 1) -0.5 * ΔHo rxn(reaction 2) +1 *
ΔHo rxn(reaction 3)
= +1 * (92.0) -0.5 * (59.3) +1 * (-348.2)
= -285.85 KJ
Answer: -285.85 KJ
Calculate the standard enthalpy of formation of liquid water (H2O) using the following thermochemical information: 2...
15. # -/0.1 points 0/4 Submissions Used Calculate the standard enthalpy of formation of liquid water (H2O) using the following thermochemical information: N205(9) + H2O(1) = 2 HNO3(0) 2 N205(g) = 2 N2(g) + 5 O2(g) N2(g) + 3 O2(g) + H2(g) = 2 HNO3(1) AH = -92.0 kj AH = -59.3 kj AH = -348.2 kJ AH = kJ
Calculate the standard enthalpy of formation of liquid water
(H2O) using the following thermochemical
information:
2
B2O3(s) 4 B(s) + 3 O2(g)
H = +2509.1 kJ
B2O3(s)
+ 3 H2O(l) B2H6(g) + 3
O2(g)
H = +2147.5 kJ
2 B(s) + 3 H2(g)
B2H6(g)
H = +35.4 kJ
H = ______ kJ
Calculate the standard enthalpy of formation of liquid water
(H2O) using the following thermochemical
information:
CH4(g) C(s) + 2 H2(g)
H = +74.8 kJ
CO2(g) C(s) + O2(g)
H = +393.5 kJ
CO2(g) + 2 H2O(l) CH4(g) + 2 O2(g)
H = +890.4 kJ
Calculate the standard enthalpy of formation of gaseous
acetylene (C2H2) using the following
thermochemical information:
2
C2H2(g) + 5 O2(g) 4 CO2(g) + 2 H2O(l)
H = -2599.3 kJ
CO2(g) C(s) + O2(g)
H = +393.5 kJ
2 H2O(l) 2 H2(g) + O2(g)
H = +571.7 kJ
H = kJ
Calculate the standard enthalpy of formation of gaseous methane
(CH4) using the following thermochemical
information:
CO2(g) + 2
H2O(l) CH4(g) + 2 O2(g)
H = +890.4 kJ
CO2(g) C(s) + O2(g)
H = +393.5 kJ
2 H2O(l) 2 H2(g) + O2(g)
H = +571.7 kJ
Calculate the standard enthalpy of formation of gaseous carbon
dioxide (CO2) using the following thermochemical
information:
2 C(s) + H2(g)
C2H2(g)
H = +226.8 kJ
2
C2H2(g) + 5 O2(g) 4 CO2(g) + 2 H2O(l)
H = -2599.3 kJ
2 H2O(l) 2 H2(g) + O2(g)
H = +571.7 kJ
H = _______kJ
Consider the following data. 2 H2(g) + O2(g) 2 H2O(l) ΔH = -571.7 kJ N2O5(g) + H2O(l) 2 HNO3(l) ΔH = -92.0 kJ N2(g) + 3 O2(g) + H2(g) 2 HNO3O(l) ΔH = -348.2 kJ Use Hess's law to calculate ΔH for the reaction below. 2 N2O5(g) 2 N2(g) + 5 O2(g) ΔH = _____kJ
Calculate the standard enthalpy of formation of gaseous carbon
tetrafluoride (CF4) using the following thermochemical
information:
2 HF(g) H2(g) + F2(g)
H = +537 kJ
2 CF4(g) + 4 HF(g)
C2H4(g) + 6
F2(g)
H = +2486.3 kJ
C2H4(g)
2 C(s) + 2 H2(g)
H = -52.3 kJ
Calculate the standard enthalpy of formation of gaseous carbon
tetrafluoride (CF4) using the following thermochemical
information:
2 HF(g) H2(g) + F2(g)
H = +537 kJ
2 CF4(g) + 4 HF(g)
C2H4(g) +...
15. + -10.1 points 0/4 Submissions Used Calculate the standard enthalpy of formation of gaseous nitrogen monoxide (NO) using the following thermochemical information: N2(g) + 3 H2(g) = 2 NH3(9) 4 NO(g) + 6 H2O(l) = 4 NH3(g) + 5 O2(9) 2 H2O(1) = 2 H2(g) + O2(9) AH = -92.4 kJ AH = +1167.1 kJ AH = +571.7 kJ AH =
Calculate the standard enthalpy of formation of solid calcium
carbonate (CaCO3) using the following thermochemical
information:
Calculate the standard enthalpy of formation of solid calcium carbonate (CaCo3) using the following thermochemical information: 2 Cao(s) 2 Ca(s) O2(g) AH 1270.2 kJ C(s) O2 (g) CO2 (g) AH 393.5 kJ AH 178.3 kJ CaO(s) CO2 (g) CaCO3(s) kJ AH