Chemistry, 18.12.2019 05:31 kellymcdow9385
The standard enthalpy of reaction for the dissolution of silica in aqueous hf is 4.6 kj mol–1 . what is the standard enthalpy of formation of sif4(g)?
sio2(s) + 4 hf(aq) → sif4(g) + 2 h2o(l) ∆hºrxn = 4.6 kj mol–1
compound sio2(s) hf(aq) h2o(l) sif4(g)
∆hºf, kj mol–1 –910.9 –320.1 –285.8
(a) –1624.3 kj mol^–1
(b) –1615.1 kj mol^–1
(c) –949.8 kj mol^–1
(d) –940.6 kj mol^–1
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