Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
An ionic compound has a very negative heat of solution in water. Would you expect it to be very soluble, slightly soluble, or nearly insoluble in water?
|
Very soluble
|
|
|
Which of the following sets of changes would definately result an originaly saturated solution of O2(g) in H2O(l) becoming unsaturated WITHOUT removing oxygen?
1.increase pressure, increase temp 2.Increase pressure, decrease temp 3. Decrease pressure, decrease temp 4. decrease pressure, increase temp |
2. increase pressure, decrease temp.
|
|
|
Which of the following intermolecular forces exists in all solid substances?
|
Dispersion Forces
|
|
|
Which of the following statements are true?
1.A positive heat of formation means that a solution will not form. 2. The Entropy of a solution is ALWAYS greater than the entropy of the seperate components. 3. The solubility of a gas in a liquid always increases with pressure. |
3 only
|
|
|
Which of the following aqueous solutions would be expected to have the highest vapor pressure?
A. 0.01 m NaCl B. 0.05 m methanol (CH3OH) C. 0.01 m K2SO4 D. 0.02 m CaCl2 E. 0.03 m ethanol (C2H5OH) |
A. 0.01 m NaCl ion-ion intermolecular force
|
|
|
The units of the rate constant for a zero-order reaction could be:
A. M/s B. M^-1.s^-1 C. s^-1 D. M^-2.s^-1 E. none of these |
A. M/s
|
|
|
Which of the following statements is FALSE?
A. In order for a reaction to occur, reactant molecules must collide. B. A catalyst alters the rate of a reaction and is neither a product nor a reactant in the overall equation. C. A reaction of the form, 2A+B----products, will usually have a one step mechanism. D. The rate of the bimolecular reaction A+B-----products is proportional to the freuency of collisions between A and B. E. The transition state is a short lived, high energy state, intermediate between reactants and products. |
C
|
|
|
The effect of a catalyst is to:
A. decrease the "effective concentrations of the reactants" B. increae the local temperature of the reactants C. lower the activation energy of a reaction D. increase the energy of the reactants E. increase the overall number of collisions between reactants. |
C.
|
|
|
The stronger the intermolecular forces in a substance
A. the higher the boiling point B. the lower the boiling point C. the higher the vapor pressure D. the smaller the deviation from the ideal gas behavior. |
A. the higher the boiling point.
|
|
|
Which substance has the highest boiling point.
A. CH4 B. He C. HF D. Cl2 |
C. HF hydrgen bonding
|
|
|
Which of these solid substances has a crystal structure containing discrete molecules?
A. Dry ice B. quartz C. graphite D. silver bromide |
A. Dry Ice
|
|
|
Which of the following properties does not increase with increasing intermolecular forces.
A. Viscosity B. Heat of vaporization C. Melting point D. vapor pressure |
D. vapor pressure
|
|
|
Neon condenses due to____
|
london dispersion forces
|
|
|
Ammonia's unusually high melting point is the result of
|
Hydrogen bonding
|
|
|
When the electron cloud of a molecule is easily distorted, the molecule has a high____
A. polarity B. polarizability C. dipole moment D. van der Waals radius |
B. polarizability
|
|
|
The strongest intermolecular interactions between hydrogen fluoride (HF) molecules arise from
|
Hydrogen Bonding
|
|
|
The energy needed to increase the surface area of a liquid by one square meter is
A. capillary action B. surface tension C. viscosity D. cohesion |
B. surface tension
|
|
|
The resistance of a liquid to flow is:
A. surface tension B. capillary action C. viscosity D. adhesion |
C. viscosity
|
