All required constants and additional information required for this test can be found on the reference page (pg. 1). The only\ additional resource permitted is a calculator. Any evidence of violation of this policy will result in a test score of 0 . The number of\ points for each question is indicated in italicized parentheses to the right at the end of the question. If unspecified, the question is\ worth 1 point.\ Part A: Knowledge/Understanding (15)\ Which of the following reactions are exothermic? Select all that apply.\ b.

A+B->AB,\\\\Delta H=275k(J)/(m)ol

\ c.

CD+300k(J)/(m)ol->C+D

\ d. A dissolution reaction in a calorimeter where the initial temperature is

13\\\\deg C

and the final\ temperature is

22\\\\deg C

.\ The standard enthalpy for an element in its standard state is always\ a. zero\ b. negative\ c. positive\ d. higher for solids\ A bag of

-10\\\\deg C

ice is placed in a cooler containing

20\\\\deg C

soda cans. Which statement is most accurate about\ what will happen?\ a. Coldness flows out of the ice into the surrounding objects until everything is

-10\\\\deg C

\ b. Heat flows from the surrounding objects into the ice until everything is

-10\\\\deg C

\ c. Heat flows from the surrounding objects into the ice until all objects in the cooler are the same\ temperature, somewhere between

-10\\\\deg C

and

20\\\\deg C

.\ d. Coldness flows out of the ice into the surrounding objects until all objects in the cooler are the same\ temperature, somewhere between

-10\\\\deg C

and

20\\\\deg C

.\ Which equation would correctly calculate the enthalpy for the reaction:

2H_(2)+O_(2(g))->2H_(2)O_((g))

?\ a.

\\\\Delta H=\\\\Delta H_(f(H2O))\\\\deg -(\\\\Delta H_(f(O2))\\\\deg +\\\\Delta H_(f(H2))\\\\deg )

\ b.

\\\\Delta H=\\\\Delta H_(f(H2O))\\\\deg

\ c.

\\\\Delta H=2\\\\Delta H_(f(H2O))\\\\deg

\ d.

\\\\Delta H=2H_(f(H2O))\\\\deg +2\\\\Delta H_(vap(H2O))\\\\deg

\ e.

\\\\Delta H=2H_(f(H2O))\\\\deg -2\\\\Delta H_(vap(H2O))\\\\deg