CHEM 162 TEST 1 UPDATED ACTUAL QUESTIONS AND
CORRECT Answers
Given the original reaction coordinate on the left, if the C
temperature of system were increased, the new
reaction coordinate would be plot
A 0.100 M ionic solution completely dissolves and has C
an osmotic pressure of 7.34 atm at 298 K. Based on its
van't Hoff factor, which of the following might be the
ionic compound solute?
A.
CH3Cl
B.
NaCl
C.
MgCl2
D.
BBr3
E.
Al2(SO4)3
Benzene has a heat of vaporization of 30.72 kJ/mol and ln(325 torr/760 torr) = - (30720 J/8.314 J/mol K) (1/T2 - 1/353.25 K) = 326K
a normal boiling point of 353.25 K. At what temperature
does benzene boil when the external pressure is 325
torr?
An aqueous solution is saturated in both NaCl and As NaCl becomes more soluble, solid NaCl dissolves. As oxygen gas becomes
oxygen gas at room temperature. With regard to their less soluble, more dissolved oxygen forms bubbles and separates from the
solubility, what should you see change in the phases of solution.
NaCl and oxygen gas when solution is warmed to 85
°C?
Acetic acid has a normal boiling point of 118 ºC and a ln(P2/760 torr) = -23.4 kJ/mol /8.314 J/mol * K (1/391.15 K - 1/298.15 K) = 80.6
ΔHvap of 23.4 kJ/mol. Calculate is the vapor pressure mmHg
(in mmHg) of acetic acid at 25.0 ºC?
CORRECT Answers
Given the original reaction coordinate on the left, if the C
temperature of system were increased, the new
reaction coordinate would be plot
A 0.100 M ionic solution completely dissolves and has C
an osmotic pressure of 7.34 atm at 298 K. Based on its
van't Hoff factor, which of the following might be the
ionic compound solute?
A.
CH3Cl
B.
NaCl
C.
MgCl2
D.
BBr3
E.
Al2(SO4)3
Benzene has a heat of vaporization of 30.72 kJ/mol and ln(325 torr/760 torr) = - (30720 J/8.314 J/mol K) (1/T2 - 1/353.25 K) = 326K
a normal boiling point of 353.25 K. At what temperature
does benzene boil when the external pressure is 325
torr?
An aqueous solution is saturated in both NaCl and As NaCl becomes more soluble, solid NaCl dissolves. As oxygen gas becomes
oxygen gas at room temperature. With regard to their less soluble, more dissolved oxygen forms bubbles and separates from the
solubility, what should you see change in the phases of solution.
NaCl and oxygen gas when solution is warmed to 85
°C?
Acetic acid has a normal boiling point of 118 ºC and a ln(P2/760 torr) = -23.4 kJ/mol /8.314 J/mol * K (1/391.15 K - 1/298.15 K) = 80.6
ΔHvap of 23.4 kJ/mol. Calculate is the vapor pressure mmHg
(in mmHg) of acetic acid at 25.0 ºC?
