Multiple Choice Questions:

1) What is the ?h value for the reverse reaction of the following reaction: co2 (g) + 2h2o (l) ? ch4 (g) + o2 (g) ?hforward = +890 kj

a. + 445 kj

b. – 445 kj

c. + 890 kj

d. – 890 kj

2) A piece of copper weighs 125 g. if 1.33 x 104 j heat is needed to raise the temperature of the copper from 25 c to 300 c, what is the specific heat, c, of copper?

a. 133.0 j/(g*k)

b. 387.0 j/(g*k)

c. 0.387 j/(g*k)

d. 1330.0 j/(g*k)

3) Which of the following elements has the highest electro negativity?

a. p

b. ba

c. pb

d. f e. mg

4) Which of the following elements has the smallest ionization energy?

a. na

b. ba

c. fr

d. cl e. la