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6.70 g sample of SiH4 and an excess of oxygen were placed in a reaction container surrounded by 2.80 kg of water. The initial temperature of the water was 12.50°C. At the end of the reaction, the temperature of the water was 49.00°C. Assume that the heat was completely absorbed by the water and no heat was absorbed by the reaction container or the calorimeter or lost to the surroundings. Calculate the ?Hrxn per mole of SiH4. The specific heat of water is 4.184 J/g·°C.

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Category:- Chemistry
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