1) What is the boiling point (in degrees Celsius) of chloroform on the moon? Cal

Question

1) What is the boiling point (in degrees Celsius) of chloroform on the moon?

Calculate using the Clausius-Clapeyron equation. ln(P2/P1)= deltaH/R (1/T1-1/T2)

2) Secondly, what phase will the chloroform be in on the surface of the moon, considering its pressure and temperature?

Extended 10:01 AM * 100% Artemis chloroform item ( Detail Submission Grade Artemis chloroform item Due: Dec 8, 2017 at 10:00 AM 1) What is the boiling point (in degrees Celsius) of chloroform on the moon? Calculate using the Clausius- Clapeyron equation. 2) Secondly, what phase will the chloroform be in on the surface of the moon, considering its pressure and temperature? Courses CalendarTo Do NotificationsInbox

Explanation / Answer

For Chloroform; the standard enthalpy change of vaporization, Hovap = 31.4 kJ/mol = 31.4 x 1000 J/mol
P1 = 1 atm,
T1 = 61.3 oC = 273.15 + 61.3 = 334.45 K

The moon pressure P2 = 3×1015 atm

the boiling point at moon T2 = ?

Now use the Clausius-Clapeyron Equation:

    ln (P1 / P2) = (H / R) (1/T2 - 1/T1)
   ln(1 atm/3×1015 atm) = (31.4 x 1000 J/mol/8.314 J K1 mol1 ) (1/T2 - 1/334.45 K)
   ln (3.333 x 1014) = 3777 (1/T2 - 1/334.45 K)
   ln 3.333 + 14 lo(10) = 3777 (1/T2 - 1/334.45 K)
   1.204 + 14 x 2.30 = 3777 (1/T2 - 1/334.45 K)
   33.44 = 3777 (1/T2 - 1/334.45 K)
   0.00885 = (1/T2 - 1/334.45 K)
   1/T2 = 0.01184
   T2 = 84.43 K
   T2 = -188.7 oC
Therefore, the boiling point of Chloroform at moon = -188.7 oC

During daytime the moon's surface, the temperature: approximately, 127 oC
During night, temperatures can go upto : minus 173 oC.

Therefore, the temperature on the moon's surface always greater than the boiling temperature of chloroform
(-188.7 oC). Hence, the chloroform always in vapor state (gaseous) on the moon's surface.

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