Determine the enthalpy of vaporization for a liquid that has a vapor pressure of 230 mmHg at 25.0 oC and a vapor pressure of 614 mmHg at 50.0 oC. Show all work to receive full credit and answer with correct sig figs and units.

Distinguish between intramolecular and intermolecular forces.

Calculate the freezing point of a solution of 48.4 g of ethylene glycol (C2H6O2) dissolved in 300.0 g of water.  Kf = 1.86°C/m and Kb = 0.512°C/m. Show all work to receive full credit.

How is dispersion different from dipole-dipole interaction?

For the reaction, 3 A(g) + 2 B(g) → 2 C(g) + 2 D(g), the following data were collected at constant temperature. Determine the rate law. Show all work to receive full credit. Trial     Initial [A]     Initial [B]     Initial rate (M/min)1            0.200            0.100            6.00 x 10-22            0.100            0.100            1.50 x 10-23            0.200            0.200            1.20 x 10-14            0.300            0.200            2.70 x 10-1

What does the phrase “like dissolve like” mean?

What is the consequence of modifying a collection (e.g., by calling list.add()) while iterating over it using its iterator, without using the iterator’s own remove() method?

For the reaction, A(g) + 2B(g) 2C9g) + 2D(g), the following data were collected at constant temperature. Predict the rate for trial 4. Show all work on scratch paper to receive full credit. Trial   Initial [A]   Initial [B]   Initial rate (M/min)1              0.125      0.200         7.252              0.375      0.200         21.753              0.375      0.400         21.754               0.250      0.400            ?

Which of the following scenarios is a significant weakness for an `ArrayList` but a strength for a `LinkedList`?

Which of the following methods are part of the `java.util.Iterator` interface? (Select all that apply)