Determine the volume at STP of 36.8 g of nitrogen dioxide (NO2)
1 answer:
17.92L
Explanation:
Given parameters:
Mass of NO₂ = 36.8g
Condition = STP
Unknown:
Volume of gas = ?
Solution:
The volume of gas can be determined at STP if the number of moles of that gas is known.
Volume of NO₂ at STP = number of moles x 22.4
Number of moles =
Molar mass of NO₂ = 14 + 2(16) = 46g/mol
Number of moles = = 0.8mole
Now;
Volume of NO₂ = 0.8 x 22.4 = 17.92L
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Answer : q = 6020 J, w = -6020 J, Δe = 0
Solution : Given,
Molar heat of fusion of ice = 6020 J/mole
Number of moles = 1 mole
Pressure = 1 atm
Molar heat of fusion : It is defined as the amount of energy required to melt 1 mole of a substance at its melting point. There is no temperature change.
The relation between heat and molar heat of fusion is,
(in terms of mass)
or, (in terms of moles)
Now we have to calculate the value of q.
When temperature is constant then the system behaves isothermally and Δe is a temperature dependent variable.
So, the value of
Now we have to calculate the value of w.
Formula used :
where, q is heat required, w is work done and is internal energy.
Now put all the given values in above formula, we get
w = -6020 J
Therefore, q = 6020 J, w = -6020 J, Δe = 0