Calculate AH and AUf for the formation of silane, SiH4(g), from its elements at 298 K, if 250 cm³ of the gaseous com- pound at T = 298 K and P = 0.658 atm is burned in a constant-volume gas calorimeter in an excess of oxygen and causes the evolution of 9.757 kJ of heat. The combus- tion reaction is SiH,(g) + 2 O2(g)→ SiO2(s, quartz) + 2 H,O(€) and the formation of silane from its elements is Si(s) + 2 H2(g) - · SİH4(g)

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Calculate AH and AUf for the formation of silane, SiH4(g),
from its elements at 298 K, if 250 cm³ of the gaseous com-
pound at T = 298 K and P = 0.658 atm is burned in a
constant-volume gas calorimeter in an excess of oxygen
and causes the evolution of 9.757 kJ of heat. The combus-
tion reaction is
SiH,(g) + 2 O2(g)→ SiO2(s, quartz) + 2 H,O(€)
and the formation of silane from its elements is
Si(s) + 2 H2(g) -
· SİH4(g)
Transcribed Image Text:Calculate AH and AUf for the formation of silane, SiH4(g), from its elements at 298 K, if 250 cm³ of the gaseous com- pound at T = 298 K and P = 0.658 atm is burned in a constant-volume gas calorimeter in an excess of oxygen and causes the evolution of 9.757 kJ of heat. The combus- tion reaction is SiH,(g) + 2 O2(g)→ SiO2(s, quartz) + 2 H,O(€) and the formation of silane from its elements is Si(s) + 2 H2(g) - · SİH4(g)
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