Respuesta :
The temperature will be 331.85 °C  which is  required to store the gas in an 8.63-L container at 875 torr.
Given data:
The reaction equation is:  CaF₂ + H₂SO₄ → 2HF + CaSO₄
The molar ratio between fluorite and hydrogen fluoride is 1 : 1.
The moles of fluorite can be determined by using the formula:
Moles = mass / molar mass.....(i)
Mass = 15 gram.
molar mass = 78.07 g
Put the value of given data in equation (i).
Moles = 15 / 78.07 Â Â Â Â Â Â Â Â Â Â Â Â Â
Moles = 0.200 mol.
The moles of hydrogen fluoride produced will be 0.2.Now, we may use the ideal gas equation to determine the temperature:
PV = nRT.....(ii)
where, P is pressure, T is temperature and n is number of moles.
Rearrange the equation (i) and put the given data. Â Â Â Â Â Â Â Â
T = PV/nR
T = (875 * 8.63) / (0.2 * 62.36)
T = 605.45K
The temperature will be 331.85 °C  which is  required to store the gas in an 8.63-L container at 875 torr.
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