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Calculate the (equilibrium) sublimation temperature of CO_2 at a pressure of 2 atm assuming a constant...
4. The standard enthalpy of fusion of mercury is 560 cal/mol at a temperature of 234.1...
4. The standard enthalpy of fusion of mercury is 560 cal/mol at a temperature of 234.1 K Assuming that the densities of solid and liquid mercury at the melting point are 14.19 and 13.69 g/cm, calculate: (report your answers in SI units for parts A and B) A. The standard entropy of fusion B. AU C. The melting point in °C) at 20 torr and 10 atm
1.000 mol of ammonia is vaporized at a constant pressure of 1.000 atm and a constant...
1.000 mol of ammonia is vaporized at a constant pressure of 1.000 atm and a constant temperture of 240 K, the normal boiling temperture. The enthalpy change of the vaporization at this temperture is 25.11 kJ/mol. Find delta G, delta S, w and q.
A 0.617-mol sample of CO_2(g) initially at 298 K and 1.00 atm is held at constant...
A 0.617-mol sample of CO_2(g) initially at 298 K and 1.00 atm is held at constant pressure while enough heat is applied to raise the temperature of the gas by 13.1 K. Calculate the amount of heat q required to bring about this temperature change, and find the corresponding total change in the internal energy DeltaU of the gas. Assume that the constant-pressure molar specific heat for CO_2(g), which consists of linear molecules, is equal to 7R/2, where R is...
The vapor pressure of Y is 4.560 atm at 440K and 13.680 atm at 515K. What...
The vapor pressure of Y is 4.560 atm at 440K and 13.680 atm at 515K. What are the standard free energies of vaporization at the two temperatures? Hint: vaporization reaction is Y(l) = Y(g). G440o = -5.55 kJ/mol G515o = -11.20 kJ/mol Assume that the standard entropy and enthalpy of vaporization of Y are independent of temperature and determine their values delta S = J/(mol-K) delta H = kJ/mol What is the normal boiling point of Y in degrees Celcius?...
When the pressure P is constant at 1 atm, the melting point of Br_2 is T_m...
When the pressure P is constant at 1 atm, the melting point of Br_2 is T_m = 265.95 K and its boiling point is T_b = 331.85 K. Br_2 is therefore liquid at 298 K and 1 atm but it also has a finite vapor pressure hence the property of both liquid and gas Br_2 can be obtained at at 298 K and 1 atm. Using a DeHoff equation and the thermodynamic table on D2L calculate the absolute molar entropy...
The enthalpy of fusion of cadmium at its normal melting point of 321 °C is 6.11...
The enthalpy of fusion of cadmium at its normal melting point of 321 °C is 6.11 kJ mol? What is the entropy of fusion of cadmium at this temperature? ASfus = J mol-K-1 The molar enthalpy of fusion of solid cadmium is 6.11 kJ mol-1, and the molar entropy of fusion is 10.3 JK+mol-1. (a) Calculate the Gibbs free energy change for the melting of 1.00 mol of cadmium at 622 K. (b) Calculate the Gibbs free energy change for...
The vapor pressure of Y is 1.620 atm @ 200K and 4.698 atm @ 273K. What...
The vapor pressure of Y is 1.620 atm @ 200K and 4.698 atm @
273K. What are the standard free energies of vaporization
temperatures? Hint: vaporization reaction is Y(l) = Y(g)
(at 200K)
(at 273K)
Assume that the standard entropy and enthalpy of vaporization of
Y are independent of temperature and determine their values.
(Delta S degrees)
(Delta H degrees)
What is the normal boiling point of Y in degrees Celcius?
t= ? degrees Celsius
What is the vapor pressure...
1) a) Calculate the Fermi energy for gold at OK. The density of gold is 19.3...
1) a) Calculate the Fermi energy for gold at OK. The density of gold is 19.3 g/cm3, and the molar mass is 197 g/mol. b) The Fermi energy for other temperatures can be approximated as TE? ( kT EF(T)- EF(0) 1- . At what temperature would the Fermi energy of Au 12 E (0) be reduced by 1%? Compare this temperature with the melting point of Au (1337 K). Is it reasonable to assume the Fermi energy is a constant,...
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...
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...
4. The standard enthalpy of fusion of mercury is 560 cal/mol at a temperature of 234.1 K Assuming that the densities of solid and liquid mercury at the melting point are 14.19 and 13.69 g/cm, calculate: (report your answers in SI units for parts A and B) A. The standard entropy of fusion B. AU C. The melting point in °C) at 20 torr and 10 atm
A 0.617-mol sample of CO_2(g) initially at 298 K and 1.00 atm is held at constant pressure while enough heat is applied to raise the temperature of the gas by 13.1 K. Calculate the amount of heat q required to bring about this temperature change, and find the corresponding total change in the internal energy DeltaU of the gas. Assume that the constant-pressure molar specific heat for CO_2(g), which consists of linear molecules, is equal to 7R/2, where R is...
When the pressure P is constant at 1 atm, the melting point of Br_2 is T_m = 265.95 K and its boiling point is T_b = 331.85 K. Br_2 is therefore liquid at 298 K and 1 atm but it also has a finite vapor pressure hence the property of both liquid and gas Br_2 can be obtained at at 298 K and 1 atm. Using a DeHoff equation and the thermodynamic table on D2L calculate the absolute molar entropy...
The enthalpy of fusion of cadmium at its normal melting point of 321 °C is 6.11 kJ mol? What is the entropy of fusion of cadmium at this temperature? ASfus = J mol-K-1 The molar enthalpy of fusion of solid cadmium is 6.11 kJ mol-1, and the molar entropy of fusion is 10.3 JK+mol-1. (a) Calculate the Gibbs free energy change for the melting of 1.00 mol of cadmium at 622 K. (b) Calculate the Gibbs free energy change for...
The vapor pressure of Y is 1.620 atm @ 200K and 4.698 atm @
273K. What are the standard free energies of vaporization
temperatures? Hint: vaporization reaction is Y(l) = Y(g)
(at 200K)
(at 273K)
Assume that the standard entropy and enthalpy of vaporization of
Y are independent of temperature and determine their values.
(Delta S degrees)
(Delta H degrees)
What is the normal boiling point of Y in degrees Celcius?
t= ? degrees Celsius
What is the vapor pressure...
1) a) Calculate the Fermi energy for gold at OK. The density of gold is 19.3 g/cm3, and the molar mass is 197 g/mol. b) The Fermi energy for other temperatures can be approximated as TE? ( kT EF(T)- EF(0) 1- . At what temperature would the Fermi energy of Au 12 E (0) be reduced by 1%? Compare this temperature with the melting point of Au (1337 K). Is it reasonable to assume the Fermi energy is a constant,...
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