A sample of sulfur hexafluoride gas occupies a volume of 9.10 L at 198ÁC. Assuming that the pressure remains constant, what temp
2 answers:
Temperature <u>-143.6°C</u> is needed to reduce the volume to 2.50 L
<h3>Further explanation </h3>There are several gas equations in various processes:
• 1. Avogadro's hypothesis
In the same temperature and pressure, in the same volume conditions, the gas contains the same number of molecules
So it applies: the ratio of gas volume will be equal to the ratio of gas moles
<h3>V1: V2 = n1: n2 </h3>• 2. Boyle's Law
At a fixed temperature, the gas volume is inversely proportional to the pressure applied
<h3>p1.V1 = p2.V2 </h3>• 3. Charles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
<h3>V1 / T1 = V2 / T2 </h3>• 4. Gay Lussac's Law
When the volume is not changed, the gas pressure in the tube is proportional to its absolute temperature
<h3>P1 / T1 = P2 / T2 </h3>• 5. Law of Boyle-Gay-Lussac
Combined with Boyle's law and Gay Lussac's law
<h3>P1.V1 / T1 = P2.V2 / T2 </h3>P1 = initial gas pressure (N / m2 or Pa)
V1 = initial gas volume (m3)
P2 = gas end pressure
V2 = the final volume of gas
T1 = initial gas temperature (K)
T2 = gas end temperature
In the problem, the conditions that are set constant are Pressure, so we use Charles' Law
V1 / T1 = V2 / T2
V1 = 9.1 L
T1 = 198 °C+273 = 471 K
V2 = 2.5 L
Then :
a description of Charles’s law
Charles's law
State Boyle's, Charles's, and Gay-Lussac's laws
Keywords : Charles Law, temperature, pressure, vollume, gas, sulfur hexafluoride
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Answer: There are molecules present in 7.62 L of
at
and 722 torr.
Explanation:
Given : Volume = 7.62 L
Temperature =
Pressure = 722 torr
1 torr = 0.00131579
Converting torr into atm as follows.
Therefore, using the ideal gas equation the number of moles are calculated as follows.
PV = nRT
where,
P = pressure
V = volume
n = number of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the values into above formula as follows.
According to the mole concept, 1 mole of every substance contains atoms. Hence, number of atoms or molecules present in 0.244 mol are calculated as follows.
Thus, we can conclude that there are molecules present in 7.62 L of
at
and 722 torr.