The heat of combustion of gaseous ammonia is 81 kcal/mole. How much heat will be evolved in the reaction of 34 grams of ammonia with excess amount of oxygen?
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Updated on : 2022-09-05
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Correct option is E)
The molar mass of ammonia is 17 g/mol. 34 grams of ammonia corresponds to 17g/mol34g=2moles. The heat of combustion of gaseous ammonia is 81 kcal/mole. During the reaction of 34 grams (2 moles) of ammonia with excess amount of oxygen, heat evolved will be 2mol×81kcal/mol=162kcal.
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