Use the data in the table to calculate the ΔH°rxn of the following reaction at 298 K:

A certain hydrocarbon of the molecular formula CxH2x has a standard enthalpy of formation ∆Hf° = –115.0 kJ/mol and a standard enthalpy of combustion ∆H°combust = –3281.5 kJ/mol. What is x? Use the following data: ∆Hf°[CO2(g)] = –393.5 kJ/mol, ∆Hf°[H2O(l)] = –285.8 kJ/mol.   A.  x = 7   B.  x = 4   C.  x = 5   D.  x = 6   E.  x = 8

Calculate the ΔGo for X, in kJ, from the data given below at 327 K:   2X(g) → X2(g)     So (J/mol-K) ΔHo (kJ/mol) X(g) 51.2 77.4 X2(g) 61.4 171.1

Use the values of ΔHof  to calculate the ΔHo for the following reaction: 4 AB3(g) +  5 C2(g) → 4 AC(g) + 6 B2C(g) Substance ΔHof in kJ/mol AB3(g) 55.8 C2(g) 0 AC(g) 200.5 B2C(g) -65.5

Suppose we redefine the standard state as P=4bar. Find the new standard ΔfG∘ values of the following substances.     Part A HCl (g)(ΔfG∘at1bar=−95.3kJmol−1)

"M" represents a metallic element.  "X" represents a nonmetallic element.  Calculate ΔH for the process M3X4(s) ⟶ 3M(s) + 2X2(g) from the following information: M(s) + ½X2(g) ⟶ MX(s)  ΔH°= -286.2 kJ 3MX(s) + ½X2(g) ⟶ M3X4(s)  ΔH°= -84.3 kJ

Using the values in the table below, calculate AGxn at 375 K for the reaction: 3 CO g) + 4 NH3(g) → 3 CH3OH(g) + 2 N2(g) AH°F, kJ/mol AG°, kJ/mol S°, J/mol K COg) CH3OH(g) CH3OH NH3(aq) NH3(g) N2(9) -111 -137 198 -201 -162 238 -239 -166 127 -80 -27 111 -46 -17 193 192 +55 +15 -7 +100,414 +150

What is ΔSsurr (in J/K) if ΔHsys is -27.2 kJ and T is 379 K?

Consider the following reaction: CaCO 3(s) <—> CaO (g) +CO 2(g) For this reaction, delta S = +158.9 J/ mol and Delta * H ^ o = + 177.9kJ / (mol) . These values are fairly constant with changes in temperature. Over what specific temperature range is this reaction spontaneous in the forward direction?

Nitrogen ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K) N2 (g) 0 0 191.6 N (g) 472.7 455.6 153.3 NH3 (g) -46.1 -16.5 192.5 NH3 (aq) -80.0 -27.0 111.0 NH4+ (aq) -132.0 -79.0 113.0 NO (g) 90.3 86.6 210.8 NOCl (g) 51.7 66.1 261.8 NO2 (g) 33.2 51.3 240.1 N2O (g) 82.1 104.2 219.9 N2O4 (g) 9.2 97.9 304.3 N2O4 (l) -20.0 97.0 209.0 N2O5 (s) -42.0 134.0 178.0 N2H4 (l) 50.6 149.3 121.2 N2H3CH3 (l) 54.0 180.0 166.0 HNO3 (aq) -207.4 -111.3 146.4 HNO3 (l) -174.1 -80.7 155.6 HNO3 (g) -135.1 -74.7 266.4 NH4ClO4 (s) -295.0 -89.0 186.0 NH4Cl (s) -314.4 -202.9 94.6 NH4Cl (aq) -299.7 -210.5 169.9 NH4NO3 (s) -365.6 -183.9 151.1 NH4NO3 (aq) -339.9 -190.6 259.8     Oxygen ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K) O2 (g) 0 0 205.1 O (g) 249.2 231.7 161.1 O3 (g)…