A. The normal melting point of naphthalene is 80.0 °C. At 85.8 Celsius, the liquid has...
A. The normal melting point of naphthalene is 80.0 °C. At 85.8 Celsius, the liquid has a vapor pressure of 10.0 Torr which increases to 40.0 Torr at 119.3°c. Use this information to calculate the heat of vaporization, the normal boiling point, and the entropy of vaporiza of naphthalene. How similar is your calculated entropy change to the prediction of Trouton's rule?
B. Assume that the triple point temperature of naphthalene is also 80.0 Celsius and that the sublimation pressure of naphthalene is 1.00 Torr at 52.6 Celsius. Use your results from part A to determine the vapor pressure at 80.0 Celsius and then determine the heat of sublimation. From the heat of sublimation and vaporization estimate the heat of fusion and the delta S of fusion at the normal melting point.
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A. The normal melting point of naphthalene is 80.0 °C. At 85.8
Celsius, the liquid has...
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)
E4B.13(a) Naphthalene, C, H, melts at 80.2°C. If the vapour pressure of liquid is 1.3 kPa...
E4B.13(a) Naphthalene, C, H, melts at 80.2°C. If the vapour pressure of liquid is 1.3 kPa at 85.8 °C and 5.3 kPa at 119.3°C, use the Clausius-Ch equation to calculate (i) the enthalpy of vaporization, (ii) the normal point, and (iii) the entropy of vaporization at the boiling point. lausius-Clapeyror (11) the normal boiling
Consider the phase diagram of NH3. Triple point: 195.9 K and 0.069 atm Normal boiling point:...
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...
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...
Entropy of naphthalene: Consider naphthalene C10H8 at atmospheric pressure. It is a solid with a melting...
Entropy of naphthalene: Consider naphthalene C10H8 at atmospheric pressure. It is a solid with a melting point at 80.1 degrees Celsius and a boiling point at 218 degrees Celsius. The latent heat of fusion is 19,123 kJ / mol. The molar heat at constant pressure of solid naphthalene has a functional temperature dependence (in K) which is linear. Its value is 0 at T = 0 K and 188.41 J / mol-K at T = 317.15 K. The molar heat...
The temperature of hte triple point: 195.41 K Consider the phase diagram of NH3. Triple...
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...
A liquid has a vapor pressure of 100 mm Hg at 25 degrees celsius. If the...
A liquid has a vapor pressure of 100 mm Hg at 25 degrees celsius. If the heat of vaporization is 15 kj /mol, what is the normal boiling point?
1. The normal boiling point of benzene (i.e., at 1 atm) is 80.09 °C. The molar...
1. The normal boiling point of benzene (i.e., at 1 atm) is 80.09 °C. The molar enthalpy of vaporization is 30.72 kJ mol . Assuming that AvapHm and AvapSm stay constant at their values at 80.09°C, calculate the values of AvapGm at 75.0 °C, 80.09 °C and 85.0 °C. Given your calculated values, do you still expect benzene to spontaneously condense at 75.0 °C and to spontaneously evaporate at 85.0°C? -1 2. The vapor pressure of a liquid was measured...
Ethanol has a heat of vaporization of 38.56 kJ/mol and a normal boiling point of 78.4...
Ethanol has a heat of vaporization of 38.56 kJ/mol and a normal boiling point of 78.4 degrees Celsius. What is the vapor pressure of ethanol at 15 degrees Celsius?
Methylene chloride has a melting point of - 94.8°C, a boiling point of 40.0°C, a specific...
Methylene chloride has a melting point of - 94.8°C, a boiling point of 40.0°C, a specific heat of 1.21 J/g *K for the solid and liquid, and 0.608 J/g*K for the gas. The heats of fusion and vaporization are ΔHfus of 73.40 J/g, and ΔHvap of 334.35 J/g respectively. Determine how many joules of energy are needed to heat 40 grams of methylene chloride from -171.4 ° F to 333 K. Draw out and label your heating curve. This will...
E4B.13(a) Naphthalene, C, H, melts at 80.2°C. If the vapour pressure of liquid is 1.3 kPa at 85.8 °C and 5.3 kPa at 119.3°C, use the Clausius-Ch equation to calculate (i) the enthalpy of vaporization, (ii) the normal point, and (iii) the entropy of vaporization at the boiling point. lausius-Clapeyror (11) the normal boiling
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...
1. The normal boiling point of benzene (i.e., at 1 atm) is 80.09 °C. The molar enthalpy of vaporization is 30.72 kJ mol . Assuming that AvapHm and AvapSm stay constant at their values at 80.09°C, calculate the values of AvapGm at 75.0 °C, 80.09 °C and 85.0 °C. Given your calculated values, do you still expect benzene to spontaneously condense at 75.0 °C and to spontaneously evaporate at 85.0°C? -1 2. The vapor pressure of a liquid was measured...
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