Clausius clapeyron equation:
ln P1/P2 = deltaH /R * [ 1/T2 - 1/T1]
P1 = 1 atm
P2 = 92 atm (water will boil when atmospheric pressure = vapour pressure of water)
T2 = ?
T1 = 100 C = 373.15 K
delta H = 40.65 KJ/mol
R = 8.314
ln 1 / 92 = 40.65*1000 / 8.314 * [ 1 / T2 - 1/373.15]
T2 = 569.78 K = 297.78 C
if we go by formula
We can see from te figure that
92 atm = 92.92*10^5 Pa pressure is present -----> in around 300 C
So answer is 307 C
Consider again this data for Venus' atmosphere: 1 atm = 1.01 times 10^5 Pa T(K) =...
The solid/liquid phase transition of water near 1 atm external pressure is an important feature of our daily lives. Some relevant data concerning the transition include the density of liquid water at 273.15 K (0.999 g cm-3), the density of ice at 273.15 K (0.917 g cm-3), and the enthalpy of fusion of water at 273.15 K (6.008 kJ mol-1). (a) On a phase diagram, this transition appears as a line. Calculate the slope of this transition line near the...
s. Consider propane, which has a normal boiling point of -42.0°C and a heat of vaporization of 19 kJ/mol. What is the vapor pressure at 25.0°C? 6. Atmospheric pressure on the surface of Mars averages 600 Pa (6 mbar) Use the phase diagram for water below to determine the boiling and melting points for water on the surface of Mars, assuming an atmospheric pressure of 800 Pa. Note that this chart uses a logarithmic scale, so the axes major unit...
Consider the phase diagram of NH3. Triple point: 195.9 K and 0.069 atm Normal boiling point: -33.34 oC Normal freezing point: -77.73 oC Density of liquid: 0.618g/mL Density of solid: 0.817 g/mL (a) Determine the heat of fusion, the heat of vaporization, and the heat of sublimation at the triple point. (b) Determine the entropy change of fusion, vaporization, and sublimation at the triple point. (c) Plot the phase diagram in the temperature range T: [-90 oC, 130 oC]. For...
Consider the phase diagram of NH Triple point: 195.410 K and 0.06921 atm Normal boiling point:-33.342 PC Normal freezing point: -77.728 °C Density of liquid: 0.618g/mL Density of solid: 0.817 g/mL (a) Determine the heat of fusion, the heat of vaporization the heat of sublimation at near the triple point. (b) Determine the entropy change of fusion, vaporization and sublimation at near the triple point. (c) Plot the phase diagram in the temperature range T: [-90 °C, 130 °C]. For...
Data: 1.0 atm = 1.01 × 105Pa; R = 8.314 J/mol·K; k =
1.38 × 10−23 J/K
An ideal gas at 22 °C is in a sealed rigid cubic container with a volume of 113 cm at a pressure of 1.00 atm. It is heated by 55 °C to 77 °C. a) Draw a diagram. Label quantities for the initial situation with a subscript “1”, and quantities in the final situation with a subscript “2”. b) How many moles are...
The temperature of hte triple point: 195.41 K Consider the phase diagram of NH3. Triple point: 195.410 K and 0.06921 atm Normal boiling point: -33.342 oC Normal freezing point: -77.728 oC Density of liquid: 0.618g/mL Density of solid: 0.817 g/mL (a) Determine the heat of fusion, the heat of vaporization the heat of sublimation at near the triple point. (b) Determine the entropy change of fusion, vaporization and sublimation at near the triple point. (c) Plot the phase diagram...
5) Consider the phase diagram for carbon dioxide(10). Supercritical fluid Solid Liquid Pressure (atm) -78.5 -56.4 Temperature (°C)— a) What is the critical temperature for carbon dioxide? b) What is the critical pressure for carbon dioxide? c) What phase(s) is/are present at -10°C and 30 atm. d) What phase(s) is/are present at -60°C and 10 atm. - e) What phase(s) is/are present at-78.5°C and 1 atm. f) What phase(s) is/are present at-56.4°C and 5.11 atm. g) What is the normal...
General Chemistry 11 5. Consider the expansion of an ideal gas against the atmosphere. Briefly explain each of your answers below. (2 pts) a) Is AG zero, positive, or negative? b) Is AG zero, positive, or negative? c) Is the work zero, positive, or negative? d) If the expansion is done so that the temperature doesn't change, is the energy transferred as heat (9) zero, positive, or negative? 6. You can estimate atmospheric pressure at various altitudes using P =...
0 In K vs 1/T With Trendline ol4 V be y6866.30x-9.3041 R2-0.9992 30.00 -30,50 31.00 31.50 32.00 32.50 33.00 -33.50 -34.00 -34.50 -35.00 3.00 3.70 3.60 3.50 3.40 3.30 3.20 3.10 1/T (x 10 K) 4. Recalling that A, G = -RTlnKeq , use the plot shown to find the Enthalpy change for the auto-ionization of water at the temperature of the human body (37°C). Find the Change in entropy for the self-ionization of water at this temperature. to notuloz...
Physical Chemistry
Ideal Gas Problems 1.(20pts). What is the approximate mass of the earth's atmosphere. Recall Newton's 2 law is F=mass x acceleration and that the Area of a sphere is 4xr? Data: The radius of the earth is 6.37 x 10 m. Take the average pressure at the surface of the earth to be 1.00 atm, and the average acceleration due to gravity as 9.80665 m/s. List any additional assumptions that you make. 2.(20pts) (@) At 500.0°C and 699...