What error, if any, would the calculated density of the solid have if the material had a hollow center?
1 answer:
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Answer: Oxygen is the limiting reagent.
Explanation:
As can be seen from the given balanced equation:
3 moles of reacts with 1 mole of
1.52 moles of reacts with=
of
Thus is the limiting reagent as it limits the formation of products. (0.91-0.51)= 0.40 moles of
will remain as such and thus
is an excess reagent.
When 0.424 moles of an unknown hydrocarbon (∆Hc = -8.21 kJ/mol) is burned in a bomb calorimeter (C = 1.12 kJ/°C), the change in the temperature is 3.10 °C.
The heat of combustion (∆Hc) for an unknown hydrocarbon is -8.21 kJ/mol. The heat released by the combustion of 0.424 moles of the hydrocarbon is:
According to the law of conservation of energy, the sum of the heat released by the combustion (Qc) and the heat absorbed by the bomb calorimeter (Qb) is zero.
Given the heat absorbed by the bomb calorimeter (Qb) and the heat capacity of the bomb calorimeter (C), we can calculate the temperature change (ΔT) using the following expression.
When 0.424 moles of an unknown hydrocarbon (∆Hc = -8.21 kJ/mol) is burned in a bomb calorimeter (C = 1.12 kJ/°C), the change in the temperature is 3.10 °C.
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