- #1
cheechnchong
- 132
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Problem: Galena (PbS) is heated in air to form lead (II) Oxide.
2PbS(s) + 3O2 (g) --- 2PbO (s) + 2SO2 (g)
What mass of galena is converted to lead oxide if 975 KJ of heat are liberated?
My Approach:
975 KJ x (1mol/827.4KJ) = 1.18 mol
1.18 mol PbS x (239.3g PbS/1mol PbS) = 282g PbS
My concern is whether the 975KJ is in fact 975 KJ/mol...if it is, then it's going to change the answer quite a bit! Thanks
2PbS(s) + 3O2 (g) --- 2PbO (s) + 2SO2 (g)
What mass of galena is converted to lead oxide if 975 KJ of heat are liberated?
My Approach:
975 KJ x (1mol/827.4KJ) = 1.18 mol
1.18 mol PbS x (239.3g PbS/1mol PbS) = 282g PbS
My concern is whether the 975KJ is in fact 975 KJ/mol...if it is, then it's going to change the answer quite a bit! Thanks