Practice Exam 1 Blank 2002

Practice Exam 1 Blank 2002 - Exam 1 1. Chem. 1B 2002 (9...

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Exam 1 Chem. 1B 2002 1 1. (9 pts) At room pressure and temperature, a balloon, on a bottle containing liquid nitrogen, was observed to expand as liquid nitrogen vaporized to produce nitrogen gas. N 2 (l) —> N 2 (g) Circle the correct answer for this process for each of the following quantities: q, w, and E. q < 0 q > 0 q = 0 w < 0 w > 0 w= 0 E < 0 E > 0 E = 0 2. (9 pts) A sample of ethane gas is heated from 25 o C to 75 o C under conditions of constant pressure. Circle the correct answer for this process for each of the following quantities: q, w, and E. q < 0 q > 0 q = 0 w < 0 w > 0 w= 0 E < 0 E > 0 E = 0 3. (10 pts) Given the following data at 25 o C: C (graphite) + O 2 (g) CO 2 (g) H o = – 393.5 kJ 2 H 2 (g) + O 2 (g) 2 H 2 O (l) H o = – 571.6 kJ 2 C 2 H 2 (g) + 5 O 2 (g) 4 CO 2 (g) + 2 H 2 O (l) H o = – 2598.8 kJ Calculate the standard heat of formation, H f o , for C 2 H 2 (g).
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Practice Exam 1 Blank 2002 - Exam 1 1. Chem. 1B 2002 (9...

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