Which statement is true? A. Spontaneous changes are always accompanied by an increase in the enthalpy...
Which statement is true?
| A. |
Spontaneous changes are always accompanied by an increase in the enthalpy of the system. |
|
| B. |
Spontaneous changes are always accompanied by a decrease in the entropy of the system. |
|
| C. |
Spontaneous changes are always accompanied by a decrease in the enthalpy of the system. |
|
| D. |
Most highly exothermic chemical reactions are also spontaneous chemical reactions. |
|
| E. |
Spontaneous changes are always accompanied by an increase in the entropy of the system. |
For a certain chemical reaction, ∆H is < 0 and ∆S is < 0. This means that
| A. |
we conclude the reaction must be spontaneous regardless of temperature and becomes even more so at lower temperatures. |
|
| B. |
we conclude the reaction may or may not be spontaneous, but spontaneity is favored by high temperatures. |
|
| C. |
we conclude the reaction may or may not be spontaneous, but spontaneity is favored by low temperatures. |
|
| D. |
we cannot make any conclusion about spontaneity or even tendencies from the limited information presented. |
|
| E. |
we conclude the reaction must be spontaneous regardless of temperature and becomes even more so at higher temperatures. |
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Which statement is true?
A.
Spontaneous changes are always accompanied by an
increase in the enthalpy...
ОВ. For a certain chemical reaction, AH is > 0 and AS is <0. This means...
ОВ. For a certain chemical reaction, AH is > 0 and AS is <0. This means that OA. We conclude the reaction must be spontaneous regardless of temperature and becomes even more so at lower temperatures. we conclude the reaction may or may not be spontaneous, but spontaneity is favored by low temperatures. C. we conclude the reaction must be non-spontaneous regardless of temperature and becomes even more so at higher temperatures. we conclude the reaction may or may not...
CHANGES IN ENTROPY OF UNIVERSE VS SYSTEM. Evaluating Spontaneity Considering both Entropy and Enthalpy 7. In...
CHANGES IN ENTROPY OF UNIVERSE VS SYSTEM. Evaluating Spontaneity Considering both Entropy and Enthalpy 7. In a spontaneous process, which of the following always increases? a. the entropy of the system b. the entropy of the surroundings c. the entropy of the universe d. the entropy of the system and the universe c. the entropy of the system, surroundings and the universe (Hand S refer to the system), a. AH>0 8. Processes are always spontaneous, regardless of temperature, when and...
Determine whether each of the following statements about the thermodynamic functions are True or False as...
Determine whether each of the following statements about the thermodynamic functions are True or False as they apply to chemical reactions. True False Spontaneity is increased by positive entropy changes. True False All spontaneous chemical reactions have negative heats of reaction. True False Spontaneity is increased by negative enthalpy changes. True False Entropy and enthalpy are multiplied in the Gibbs free energy. True False The heat of reaction at constant pressure is always equal to the work done by the reaction.
Entropy (S) The second factor involved in determining whether or not a process is spontaneous is...
Entropy (S) The second factor involved in determining whether or not a process is spontaneous is the change in randomness or entropy (AS). Entropy is represented by the symbol S. Again, experience can help us understand the relationship between entropy and spontaneous processes. If we look at the two drawings below, we can predict which picture represents the stack of marbles "before" and after they are bumped. We expect the stack of marbles (less random, lower entropy) to be the...
30) At constant pressure and temperature, which statement is true? A) All reactions for which k...
30) At constant pressure and temperature, which statement is true? A) All reactions for which k < 1 are spontaneous B) All reactions for which AG are spontaneous C) All reactions for which AH<0 are spontaneous. D) All reactions for which AS <0 are spontaneous 11) 11) Consider the galvanic cell, Pb(s) IP20) Cu2+(a) Cu(s). Which one of the following changes to the cell would cause the cell potential to increase (ie, become more positive)? A) increase the mass of...
free energy enthal Name Entropy (S) The second factor involved in determining whether or not a...
free energy enthal
Name Entropy (S) The second factor involved in determining whether or not a process is spontaneous is the change in randomness or entropy (AS). Entropy is represented by the symbol S. Again, experience can help us understand the relationship between entropy and spontaneous processes. If we look at the two drawings below, we can predict which picture represents the stack of marbles "before and after they are bumped. We expect the stack of marbles (less random; lower...
20) Which statement is true concerning the stand A) The standard state for N2() is the...
20) Which statement is true concerning the stand A) The standard state for N2() is the pure gas at 1 atm. B) The standard state for N2() is the pu at a concentration of 1 mol/L. tre concerning the standard states of N2(x) and C12H22011(aq)? te for N2(8) is the pure gas at 1 atm and for C12H22011(aq) is the pure solid 20) — ndard state for N2() is the pure gas at 1 mol/L and for C12H22011(aq) is the...
A reaction that has a positive AH and a positive AS will be spontaneous at high...
A reaction that has a positive AH and a positive AS will be spontaneous at high temperatures spontaneous at low temperatures spontaneous at all temperatures nonspontaneous at all temperatures QUESTION 6 Which of the following statements is FALSE? Keg for a reaction written in reverse is the reciprocal of the key for the forward reaction A reaction quotient (Q) larger than Keq means that the reaction will shift toward reactants Chemical equilibrium indicates that reactants and products are present in...
acide 5520 Stack 35039 Which of the following statements is a low of thermodynamics? Group of...
acide 5520 Stack 35039 Which of the following statements is a low of thermodynamics? Group of answer choices A) At higher temperatures, a reaction will always occur. B) The enthalpy of a pure, perfect, crystalline substance at OK is OKJ/mol. C)The entropy of the universe must increase for a spontaneous process. The energy of the universe must decrease www.cheggcomhomework-help ovestions and answers latinum-could-
8. For the following reaction, CC2(s) + 2H2O(l) + Ca(OH)2(s) + C2H2(g) which is spontaneous at all temperatures, on...
8. For the following reaction, CC2(s) + 2H2O(l) + Ca(OH)2(s) + C2H2(g) which is spontaneous at all temperatures, one would predict that a. AG is positive for all temperatures. d. AH is - and AS is for the reaction. b. AH is + and AS is for the reaction. e. AH is + and AS' is- for the reaction. c. AH is - and AS is for the reaction. 9. Calculate the standard absolute entropy, in J/mol K. of Mg:...
ОВ. For a certain chemical reaction, AH is > 0 and AS is <0. This means that OA. We conclude the reaction must be spontaneous regardless of temperature and becomes even more so at lower temperatures. we conclude the reaction may or may not be spontaneous, but spontaneity is favored by low temperatures. C. we conclude the reaction must be non-spontaneous regardless of temperature and becomes even more so at higher temperatures. we conclude the reaction may or may not...
CHANGES IN ENTROPY OF UNIVERSE VS SYSTEM. Evaluating Spontaneity Considering both Entropy and Enthalpy 7. In a spontaneous process, which of the following always increases? a. the entropy of the system b. the entropy of the surroundings c. the entropy of the universe d. the entropy of the system and the universe c. the entropy of the system, surroundings and the universe (Hand S refer to the system), a. AH>0 8. Processes are always spontaneous, regardless of temperature, when and...
Entropy (S) The second factor involved in determining whether or not a process is spontaneous is the change in randomness or entropy (AS). Entropy is represented by the symbol S. Again, experience can help us understand the relationship between entropy and spontaneous processes. If we look at the two drawings below, we can predict which picture represents the stack of marbles "before" and after they are bumped. We expect the stack of marbles (less random, lower entropy) to be the...
30) At constant pressure and temperature, which statement is true? A) All reactions for which k < 1 are spontaneous B) All reactions for which AG are spontaneous C) All reactions for which AH<0 are spontaneous. D) All reactions for which AS <0 are spontaneous 11) 11) Consider the galvanic cell, Pb(s) IP20) Cu2+(a) Cu(s). Which one of the following changes to the cell would cause the cell potential to increase (ie, become more positive)? A) increase the mass of...
free energy enthal
Name Entropy (S) The second factor involved in determining whether or not a process is spontaneous is the change in randomness or entropy (AS). Entropy is represented by the symbol S. Again, experience can help us understand the relationship between entropy and spontaneous processes. If we look at the two drawings below, we can predict which picture represents the stack of marbles "before and after they are bumped. We expect the stack of marbles (less random; lower...
20) Which statement is true concerning the stand A) The standard state for N2() is the pure gas at 1 atm. B) The standard state for N2() is the pu at a concentration of 1 mol/L. tre concerning the standard states of N2(x) and C12H22011(aq)? te for N2(8) is the pure gas at 1 atm and for C12H22011(aq) is the pure solid 20) — ndard state for N2() is the pure gas at 1 mol/L and for C12H22011(aq) is the...
A reaction that has a positive AH and a positive AS will be spontaneous at high temperatures spontaneous at low temperatures spontaneous at all temperatures nonspontaneous at all temperatures QUESTION 6 Which of the following statements is FALSE? Keg for a reaction written in reverse is the reciprocal of the key for the forward reaction A reaction quotient (Q) larger than Keq means that the reaction will shift toward reactants Chemical equilibrium indicates that reactants and products are present in...
acide 5520 Stack 35039 Which of the following statements is a low of thermodynamics? Group of answer choices A) At higher temperatures, a reaction will always occur. B) The enthalpy of a pure, perfect, crystalline substance at OK is OKJ/mol. C)The entropy of the universe must increase for a spontaneous process. The energy of the universe must decrease www.cheggcomhomework-help ovestions and answers latinum-could-
8. For the following reaction, CC2(s) + 2H2O(l) + Ca(OH)2(s) + C2H2(g) which is spontaneous at all temperatures, one would predict that a. AG is positive for all temperatures. d. AH is - and AS is for the reaction. b. AH is + and AS is for the reaction. e. AH is + and AS' is- for the reaction. c. AH is - and AS is for the reaction. 9. Calculate the standard absolute entropy, in J/mol K. of Mg:...
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