How many moles of helium are in a Superman ballon of volume 8.5 L at 92.3 kPa and 287 K?
1 answer:
Answer : The number of moles of helium are, 0.329 mol.
Explanation :
To calculate the moles of helium gas we are using ideal gas equation.
where,
P = Pressure of gas = 92.3 kPa = 0.911 atm
V = Volume of gas = 8.5 L
n = number of moles = ?
R = Gas constant =
T = Temperature of gas = 287 K
Now put all the given values in above equation, we get:
Thereofore, the number of moles of helium are, 0.329 mol.
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The new volume at standard pressure of 1 atm is 21294 liters.
Explanation:
Data given:
Initial volume of the gas V1 = 338 liters
initial pressure on the gas P1 = 63 atm
standard pressure as P2 = 1 atm
Final volume at standard pressure V2 =?
The data given shows that Boyle's law equation is to used:
P1V1 = P2V2
rearranging the equation to calculate V2,
V2 =
Putting the values in the equation:
V2 =
= 21294 L
as the pressure on the gas is reduced to 1 atm the volume of the gas increased incredibly to 21294 litres.
Answer:
Equilibrium constant for is 0.5
Equilibrium constant for decomposition of is
Explanation:
dissociates as follows:
initial 0.72 mol 0 0
at eq. 0.72 - 0.40 0.40 0.40
Expression for the equilibrium constant is as follows:
Substitute the values in the above formula to calculate equilibrium constant as follows:
Therefore, equilibrium constant for is 0.5
Now calculate the equilibrium constant for decomposition of
It is given that is decomposed.
decomposes as follows:
initial 1.0 M 0 0
at eq. concentration of is:
Expression for equilibrium constant is as follows:
Substitute the values in the above expression
Equilibrium constant for decomposition of is