22) Given: 4 NO 2 ( g ) + O 2 ( g ) 2 N 2 O 5 ( g ) H ° = -110.2 kJ find H ° for

Question

22)

Given: 4 NO2(g) + O2(g) 2 N2O5(g) H° = -110.2 kJ
find H° for N2O5(g) 2 NO2(g) + 1/2 O2(g).

Select one:

A. -55.1 kJ

B. 220.4 kJ

C. 55.1 kJ

D. -220.4 kJ

23)

For the of freezing liquid ethanol at a given temperature and pressure,

Select one:

A. H is negative and S is positive.

B. H is negative and S is negative.

C. H is positive and S is positive.

D. H is positive and S is negative.

30)

A process is carried out at constant pressure. Given that 0 > H > E,

Select one:

A. the system loses heat and contracts during the process.

B. the system loses heat and expands during the process.

C. the system absorbs heat and contracts during the process.

D. the system absorbs heat and expands during the process.

32)

Which of the following has the smallest mass?

Select one:

A. 85.0 g of Cl2

B. 2.50 mol of F2

C. 3.50 × 1023 molecules of I2

D. 0.050 kg of Br2

34)

How many milliliters of a 9.0 M H2SO4 solution are needed to make 0.35 L of a 3.5 M solution?

Select one:

A. 900 mL

B. 140 mL

C. 0.14 mL

D. 0.90 mL

Explanation / Answer

22) A

23) b

30) a

32) d

34) c

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