For a given pure substance, vapor pressure values were determined experimentally in equilibrium with the solid...
For a given pure substance, vapor pressure values were determined experimentally in equilibrium with the solid and liquid phases, at different temperatures, from which the following ratios were deduced:
Solid / vapor equilibrium: ln (p / mmHg) = 17.44 - 939.7 / (T /
K)
Liquid / vapor balance: ln (p / mmHg) = 16.02 - 820.0 / (T / K)
a) Determine the coordinates (p, T) of the triple point of the
substance.
b) Assuming that the enthalpy values of sublimation and vaporization do not vary significantly with temperature, determine the value of the molar enthalpy of melting.
Homework Answers
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For a given pure substance, vapor pressure values were
determined experimentally in equilibrium with the solid...
1. Table I gives the vapor pressure of tetrachloromethand Table 1: Data for Problem at various...
1. Table I gives the vapor pressure of tetrachloromethand Table 1: Data for Problem at various temperatures for the solid and liquid phases. Phase Assuming ideal gas behavior, calculate: Solid i 230.0 K A. the change in the molar enthalpy of sublimation Solid F. 250.0K (HINT: use value for the "starting" phase) Liquid in 280.0 K B. the change in the molar enthalpy of vaporization (HINT: use value for the "starting" phase) Liquid final 340.0 K C. the change in...
proulem set. 1. Table 1 gives the vapor pressure of tetrachloromethane Table 1: Data for Problem...
proulem set. 1. Table 1 gives the vapor pressure of tetrachloromethane Table 1: Data for Problem 1 at various temperatures for the solid and liquid phases. Phase Assuming ideal gas behavior, calculate: Solid 230.0 K 225.7 Pa A. the change in the molar enthalpy of sublimation Solid 250.0K 905.0 Pa (HINT: use value for the “starting" phase) Liquid 280.0 K 6440 Pa B. the change in the molar enthalpy of vaporization Liquid 340.0K 62501Pa (HINT: use value for the "starting"...
15. According to the Clausius-Clapeyron equation ln va R T T P"арф) refers to the vapor...
15. According to the Clausius-Clapeyron equation ln va R T T P"арф) refers to the vapor pressure at temperature 1, R-2 cal/mol-K, and Ah is the heat of changc associated with the process of transitioning to the vapor (cither sublimation or vaporization depending on whether the transition is from solid to vapor or liquid to vapor) i.e., дН-H vapor-H , where X is either solid or liquid and H denotes the corresponding molar enthalpy. Use the Clausius-Clapeyron equation to solve...
Substance X is known to exist at 1atm in the solid, liquid, or vapor phase, depending...
Substance X is known to exist at 1atm in the solid, liquid, or vapor phase, depending on the temperature. Additionally, the values of these other properties of Xhave been determined.: melting point 15.°C enthalpy of fusion 8.00/kJmol density 2.00/gcm3 (solid) 1.60/gmL (liquid) boiling point 60.°C enthalpy of vaporization 31.00/kJmol heat capacity 36.·J·K−1mol−1 (solid) 29.·J·K−1mol−1 (liquid) 55.·J·K−1mol−1 (vapor) You may also assume X behaves as an ideal gas in the vapor phase. Suppose a small sample of X at −20°C is...
Naphthalene, C10H8, melts at 80.0 ˚C; the vapor pressure of the solid is 1.00 torr at 52.6 ˚C, and that of the liquid is...
Naphthalene, C10H8, melts at 80.0 ˚C; the vapor pressure of the solid is 1.00 torr at 52.6 ˚C, and that of the liquid is 10.0 torr at 85.8 ˚C and 40.0 torr at 119.3 ˚C. Calculate: (a) the enthalpy of vaporization, the normal boiling point, and the entropy of vaporization at the boiling point; (b) the vapor pressure at the melting point (Hint: liquid and solid are in equilibrium there)
X is known to exist at 1 atm in the solid, liquid, or vapor phase, depending...
X is known to exist at 1 atm in the solid, liquid, or vapor phase, depending on the temperature. Additionally, the values of these other properties of Substance X have been determined: boiling point 35. melting point enthalpy of fusion6.00 kJ/mol enthalpy of vaporization 34.00 kJ/mol 46. J-K mol (solid) 73. JK mol (vapor 2.80 g/em (solid) 2.40 g/mL (liquid density heat capacity61.JKmol Ciquid) You may also assume X behaves as an ideal gas in the vapor phase. Suppose a...
13 The equations of the sublimation and the vaporization curves of a particular material are given...
13 The equations of the sublimation and the vaporization curves of a particular material are given by (sublimation). (vaporization) In P 0.04-6/T In P 0.03 - 4/T T + dT = const. T const. Figure 8.4 P. o diagrarn for an infinitesimal Carn ot cycle. where P is in atmospheres (a) Find the temperature of the triple point. (b) Show that the spe cific latent heats of vaporization and sublimation are 4R and 6R, respectively. (You may assume that the...
The vapor pressure, P, of a certain liquid was measured at two temperatures If you were...
The vapor pressure, P, of a certain liquid was measured at two temperatures If you were going to graphically determine the enthalpy of vaporizaton, AHvap, for this liquid, what points would you plot? The data is shown in this table Number Number T(K) P (kPa) 225 3.75 675 8,62 To avoid rounding errors, use three significant figures in the x values and four significant figures in the y values. point 1 Number Number NOTE: Keep the pressure units in kPa....
2. The vapor pressure of a liquid is experimentally determined to obey the following equation В...
2. The vapor pressure of a liquid is experimentally determined to obey the following equation В =0- р In р° T+ where a, 3, and y are constants (a) (6 pts) Derive an equation giving AHvap as a function of temperature. (b) (4 pts) If a 8.20, 8 1483 K, and y-198 K, what are the vapor pressure and AHeap for this substance at 380 K?
full explanation please thank you 2) The temperature dependence of the vapor pressure of solid and...
full explanation please thank you
2) The temperature dependence of the vapor pressure of solid and liquid mercury can be represented by: in Park = 23.912_8781K in Poud –16.85370$IK tor where T is the Kelvin temperature. Use the Clapeyron equation to calculate the enthalpies of sublimation and vaporization of mercury. In addition, use the data given to calculate Mercury's triple point.
1. Table I gives the vapor pressure of tetrachloromethand Table 1: Data for Problem at various temperatures for the solid and liquid phases. Phase Assuming ideal gas behavior, calculate: Solid i 230.0 K A. the change in the molar enthalpy of sublimation Solid F. 250.0K (HINT: use value for the "starting" phase) Liquid in 280.0 K B. the change in the molar enthalpy of vaporization (HINT: use value for the "starting" phase) Liquid final 340.0 K C. the change in...
proulem set. 1. Table 1 gives the vapor pressure of tetrachloromethane Table 1: Data for Problem 1 at various temperatures for the solid and liquid phases. Phase Assuming ideal gas behavior, calculate: Solid 230.0 K 225.7 Pa A. the change in the molar enthalpy of sublimation Solid 250.0K 905.0 Pa (HINT: use value for the “starting" phase) Liquid 280.0 K 6440 Pa B. the change in the molar enthalpy of vaporization Liquid 340.0K 62501Pa (HINT: use value for the "starting"...
15. According to the Clausius-Clapeyron equation ln va R T T P"арф) refers to the vapor pressure at temperature 1, R-2 cal/mol-K, and Ah is the heat of changc associated with the process of transitioning to the vapor (cither sublimation or vaporization depending on whether the transition is from solid to vapor or liquid to vapor) i.e., дН-H vapor-H , where X is either solid or liquid and H denotes the corresponding molar enthalpy. Use the Clausius-Clapeyron equation to solve...
X is known to exist at 1 atm in the solid, liquid, or vapor phase, depending on the temperature. Additionally, the values of these other properties of Substance X have been determined: boiling point 35. melting point enthalpy of fusion6.00 kJ/mol enthalpy of vaporization 34.00 kJ/mol 46. J-K mol (solid) 73. JK mol (vapor 2.80 g/em (solid) 2.40 g/mL (liquid density heat capacity61.JKmol Ciquid) You may also assume X behaves as an ideal gas in the vapor phase. Suppose a...
13 The equations of the sublimation and the vaporization curves of a particular material are given by (sublimation). (vaporization) In P 0.04-6/T In P 0.03 - 4/T T + dT = const. T const. Figure 8.4 P. o diagrarn for an infinitesimal Carn ot cycle. where P is in atmospheres (a) Find the temperature of the triple point. (b) Show that the spe cific latent heats of vaporization and sublimation are 4R and 6R, respectively. (You may assume that the...
The vapor pressure, P, of a certain liquid was measured at two temperatures If you were going to graphically determine the enthalpy of vaporizaton, AHvap, for this liquid, what points would you plot? The data is shown in this table Number Number T(K) P (kPa) 225 3.75 675 8,62 To avoid rounding errors, use three significant figures in the x values and four significant figures in the y values. point 1 Number Number NOTE: Keep the pressure units in kPa....
2. The vapor pressure of a liquid is experimentally determined to obey the following equation В =0- р In р° T+ where a, 3, and y are constants (a) (6 pts) Derive an equation giving AHvap as a function of temperature. (b) (4 pts) If a 8.20, 8 1483 K, and y-198 K, what are the vapor pressure and AHeap for this substance at 380 K?
full explanation please thank you
2) The temperature dependence of the vapor pressure of solid and liquid mercury can be represented by: in Park = 23.912_8781K in Poud –16.85370$IK tor where T is the Kelvin temperature. Use the Clapeyron equation to calculate the enthalpies of sublimation and vaporization of mercury. In addition, use the data given to calculate Mercury's triple point.
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