(a)
Interpretation:
The pressure of the vapors of benzene is to be calculated under the given conditions.
Concept Introduction :
The ideal gas equation is the expression that relates different measurable properties of a gas. The expression is given as:
where,
P = Pressure of the gas
V = Volume of the container in which the gas is occupied
R = Ideal gas constant = 0.0821 L atm/ mol K
n = number of moles of the gas = Mass of gas / Molecular mass of gas
T = Absolute temperature of the gas i.e., temperature on Kelvin scale
(b)
Interpretation:
The pressure calculated in part (a) are to be compared with the equilibrium pressures of benzene.
Concept Introduction :
If the pressure of vapors is more than the equilibrium pressure, it indicates that the liquid has undergone condensation.
(c)
Interpretation:
The pressure of benzene vapors inside the flask is to be calculated at 50 0C and 60 0C.
Concept Introduction : When a liquid is present in a closed container, it starts to form vapors above the liquid surface. A stage is reached when the liquid and vapors are present in equilibrium with each other.
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Chapter 9 Solutions
Chemistry: Principles and Reactions
- (3) Vapor pressure of liquid ethanol is 7291 Pa at 20°C. (a) one student reports that the vapor pressure is 31741 Pa at 52°C. Another student reports it to be 31741 Pa at 502°C. Which of the results is correct? Why? (b) calculate the normal boiling temperature of ethanol (assume Patm=101,325Pa).arrow_forward12. Which substance would be expected to exhibit the greatest vapor pressure at 25°C? (A) CH3OCH3 (В) С2H5ОН (С) CН3CH2CH2ОН (D) HOCH2CH2OH 13. Ag"(aq) + 2 NH3(aq) Ag(NH3)2**(aq) For this reaction, K = 1.7 x 107 at 25°C. What is the value of AG° in kJ? (A) - 41.2 (В) — 17.9 (C) + 17.9 (D) + 41.2 14. What is the sign of AG" and the value of K for an electrochemical cell for which E -0.80 V? AG K (A) >1 (В) + >1 (C) + < I (D) < 1 15. The decomposition of ethane into two methyl radicals has a first order rate constant of 5.5 x 10-4 sec1 at 700°C. What is the half-life for this decomposition in minutes? (A) 9.1 (B) 15 (C) 21 (D) 30 Silver ions are added to a solution with [Br]= [CH]= [CO,²]=[AsO,'] = 0.1 M. Which compound will precipitate at the lowest [Ag']? 16. (A) AgBr (K, = 5.0 × 10-") (B) AgCl (K„ – 1.8 x 10-") (C) Ag,CO, (K„ - 8.1 x 10-) (D) Ag,AsO, (K„ = 1.0 × 10 ")arrow_forward3. (a) The Lattice enthalpy for the solid ionic compound AgBr is +900. kJ/mole. Write the chemical equation that corresponds to the Lattice Enthalpy for AgBr(s) in the space above. Then explain in your own words why this is a large positive number. (b) The hydration enthalpy for AgBr is -821 kJ/mole. Write the chemical equation that corresponds to the Hydration Enthalpy for AgBr(s) in the space above. Then explain in your own words why this is a large negative number.…arrow_forward
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- Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage Learning