QUESTIONS 20—23 REFER TO THE CHEMICAL OR PHYSICAL CHANGES SHOWN BELOW. FOR EACH,
ID: 484703 • Letter: Q
Question
QUESTIONS 20—23 REFER TO THE CHEMICAL OR PHYSICAL CHANGES SHOWN BELOW. FOR EACH, PREDICT THE SIGN (+, — OR 0) FOR THE THERMODYNAMIC PROPERTY. NOTE: NO TABLES SHOULD BE NEEDED FOR THESE PREDICTIONS.
20. H2O(s) —> H2O(l) at 0°C, 1 atm G is:
(1) + (2) — (3) 0 (4) more information needed
21. Cl2(g) —> 2Cl(g) at 1000 K, 1 atm. S is:
(1) + (2) — (3) 0 (4) more information needed
22. H2O(s) —> H2O(l) at 25°C, 1 atm H is:
(1) + (2) — (3) 0 (4) more information needed
23. same reaction and conditions as in 22 above S is:
(1) + (2) — (3) 0 (4) more information is needed
Explanation / Answer
Gibbs Helmholtz equation
G =H-TS
from this equation, we can say
20. G value is 0
21. S value is +
22. H value is -
23. S value is -