Table A: Enthalpy of Formation Values for Various Substances
Student Guide (continued)
Substance
Hf (kJ/mol)
NH3(g)
–46.11
NO2(g)
+33.18
CH4(g)
–74.81
C2H4(g)
+52.26
C2H6(g)
–84.68
C3H8(g)
–103.85
C3H6(g)
+20.42
CO2(g)
–393.51
H2O(g)
–241.82
CH3OH(l)
–238.86
Table B: Enthalpy of Formation of Reactants and Products
Substance
Hf (kJ/mol)
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The Johnson Center's $1.5 billion complex occupies 1,620 acres southeast of downtown Houston, in the Clear Lake area. JSC is the home of mission control and astronaut training. In its early days, the center led the Gemini, Apollo, Apollo-Soyuz and Skylab projects.