Calculate the standard enthalpy of formation of liquid methanol, CH_3OH(l): C_(graph) + 2 H_2(g) + 1/2...
Calculate the enthalpy of formation of SO_2(g) from the standard enthalpy changes of the following reactions: SO_2(g) + O_2(g) rightarrow 2 SO_3(g) Delta H degree _r times n = - 196 kJ S(s) + 3 O_2(g) rightarrow 2 SO_3(g) Delta H degree _r times n = - 790 kJ S(s) + O_2(g) rightarrow SO_2(g) Delta H degree _r times n = Number _______ kJ
Consider the following reaction: Ca(s) + 2 H_2O(l) rightarrow Ca(OH)_2(s) + H_2(g) Calculate the heat of reaction based on the following information: 2H_2(g) + O_2(g) rightarrow 2 H_2O(l) DeltaH = -572 kJ/mol CaO(s) + H_2O(l) rightarrow Ca(OH)_2(s) DeltaH = -64 kJ/mol CaCO_3(s) rightarrow CaO(s) + CO_2(g) DeltaH = +178.1 kJ/mol 2 Ca (s) + O_2(g) rightarrow 2 CaO(s) DeltaH = -1270 kJ/mol 13. Acetylene is used in blow torches, and bums according to the following equation: 2 C_2H_2(g) + 5...
Formaldehyde is manufactured by the catalytic oxidation of methanol, using excess air: CH_3OH + 1/2 O_2 rightarrow HCHO + H_2O If the reactor conditions are not properly controlled, a secondary oxidation occurs: HCHO + 1/2 O_2 rightarrow HCOOH The measured product gas composition from a test run is given in table Q_2. Determine the percentage conversion of methanol to formaldehyde (methanal). Find the percentage conversion of methanol to formic acid (methanoic acid). Calculate the molar ratio of air to methanol...
Calculate the standard enthalpy of formation of liquid water
(H2O) using the following thermochemical
information:
2 HNO3(l)
N2O5(g) +
H2O(l)
H = +92.0 kJ
2 N2(g) + 5
O2(g) 2 N2O5(g)
H = +59.3 kJ
N2(g) + 3
O2(g) + H2(g) 2 HNO3(l)
H = -348.2 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 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 combustion enthalpy of propylene at 25 ° C using the standard formation enthalpy of liquid water (-286 kJ mol-1) and the following reactions: 1) CH2CHCH3 (g) + H2 (g) → CH3CH2CH3 (g); Δ? (1) = -125 kJ mol-1 2) CH3CH2CH3 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (l); Δ? (2) = -2220 kJ mol-1 3) H 2 (g) + 0.5O2 (g) → H2O (l);Δ? ((3) = -286 kJ mol-1
A scientist measures the standard enthalpy change for the following reaction to be 60.3 kJ: co_2(G) + h_2 (G) rightarrow CO(g) + H_2O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CO_2(g) is kJ/mol.
Using Hess's Law to Calculate a Standard Enthalpy of Formation On the Solution Calorimetry Lab Report Form, vou will be asked to calculate a standard enthalpy of formation for magnesium oxide based on your experimental results. Below is an example of how to do this type of calculation. Calculate the standard enthalpy of formation of gaseous diborane (B2H6) using the following thermochemical equations: 4 B(s) + 3 O2(g)-> 2 B2O3(s) 2 H2(g) + O2(g) > 2 H20(0) B2H6(8) +3 O2(g)...
The standard enthalpy of formation of liquid hexane is ∆?? ⊖ = −196.0 ????? −1 . (i) Knowing that the standard enthalpy of vaporization of hexane is ∆?? ⊖ = +28.9 ????? −1 , estimate the enthalpy of formation of gaseous hexane. [6 marks] (ii) Knowing that the standard enthalpy of formation of liquid cyclohexane is ∆?? ⊖ = −156.0 ????? −1 , estimate the standard enthalpy of cyclization of liquid hexane. Is the reaction endothermic or exothermic?