The industrial process for making sulfuric acid has three steps. Using the data

Question

The industrial process for making sulfuric acid has three steps. Using the data given, calculate the enthalpy change for the overall reaction for the process.

The industrial process for making sulfuric acid has three steps. Using the data given, calculate the enthalpy change for the overall reaction for the process (the equation is given below). 2S(s) 30,(g) 2H3O(l) 2H2SO4(l) Data AH 296.83 k] S(s) O2 (g) SO2(g) 2SO (g) (g) 2SO (g) AH 198.2 kJ AH 227.72 k] SO (g) H2O(l) H2SO4(l) Select one: 849.9 kJ -722.8 kJ -1246.3 kj o -326.4 kJ

Explanation / Answer

S + O2 = SO2 H = -296.83

2SO3 = O2 + 2SO2 H = -198.2

SO4+ H2O = H2SO4 H = -227.72

we need:

2S in the left, so multiply (1) by 2

2S + 2O2 = 2SO2 H = -296.83*2

we need 2 H2SO4 in the right so multiply (3) by 2

2SO4+ 2H2O = 2H2SO4 H = -227.72*2

We need 3 O2 in the left side, so invert (2)

O2 + 2SO2 = 2SO3 H = -198.2*(-1)

add all

2S + 2O2 + 2SO3 + 2H2O + O2 + 2SO2 = 2SO3 + 2H2SO4 + 2SO2     H = -198.2*(-1) +  -227.72*2+ -296.83*2

cancel common terms:

2S + 3O2 + + 2H2O = + 2H2SO4

which is what we wanted so:

H = -850.9kJ/mol

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.