c6.1.4 the contact process Flashcards
1
Q
what raw materials do you need for the contact process
A
sulfur, air , water
2
Q
stage 1 of the contact process
A
S(s) + O2(g) –> SO2(g)
3
Q
stage 2 of the contact process
A
2SO2(g) + 02(g) <=> 2SO3(g)
change in energy= -144jk/mol
4
Q
Pressure for stage 2 of the contact process
A
2 atm
5
Q
Temperature for stage 2 of the contact process
A
450 degrees
6
Q
Is there a catalyst required for stage 2 of the contact process
A
Vanadium (V) oxide catalyst (V2O5)
only works above 380 degrees
7
Q
Stage 3 of the contact process
A
H20(l) + SO3(g) –> H2SO4(aq)
8
Q
Why is stage 3 not carried out?
A
It produces an extremely exothermic reaction
9
Q
Stage 3, a)
A
H2SO4(l) + SO3(g) –> H2S2O7(l)
10
Q
Stage 3, b)
A
H2S2O7(l) + H20(l) –> 2H2SO4(aq)
