0 [{"id":448529,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 14:42:49","updated_at":"2018-05-02 21:02:12","questionName":"Some endothermic reactions are spontaneous.","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":2,"explanation":"In most cases, endothermic reactions are non-spontaneous but there are some cases where they are spontaneous.","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448524,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 14:41:50","updated_at":"2018-05-02 21:02:12","questionName":"All exothermic reactions are spontaneous ","questionTimeSeconds":"0","questionTimeMinutes":"1","questionImagePath":null,"position":1,"explanation":"It is spontaneous in majority of the cases but there some exothermic reactions can also be non-spontaneous","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448569,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 15:23:35","updated_at":"2018-05-02 21:02:12","questionName":"What must be constant to work out \u0394G?","questionTimeSeconds":"0","questionTimeMinutes":"1","questionImagePath":null,"position":10,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448548,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 15:01:13","updated_at":"2018-05-02 21:02:12","questionName":"Gibb\u2019s free energy (\u0394G) is calculated using the equation? ","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":4,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448514,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 14:35:30","updated_at":"2018-05-02 21:02:12","questionName":"What equation is used to work out enthalpy (\u0394H)?","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":0,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448541,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 14:55:03","updated_at":"2018-05-02 21:02:12","questionName":"Gibb\u2019s free energy (\u0394G) for spontaneous reactions is calculated using the equation? ","questionTimeSeconds":"0","questionTimeMinutes":"1","questionImagePath":null,"position":3,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448566,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 15:20:41","updated_at":"2018-05-02 21:02:12","questionName":"In spontaneous reactions \u0394G is...","questionTimeSeconds":"0","questionTimeMinutes":"1","questionImagePath":null,"position":8,"explanation":"This is the same for \u0394G\u00b0.","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448578,"quiz_id":"23041","answer_id":null,"answerType_id":"1","created_at":"2018-05-02 15:33:33","updated_at":"2018-05-02 21:02:12","questionName":"Fill in the blank with the words: large, small.","questionTimeSeconds":"0","questionTimeMinutes":"1","questionImagePath":null,"position":12,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448560,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 15:15:06","updated_at":"2018-05-02 21:02:12","questionName":"The equation used to calculate the standard Gibb's free energy (\u0394G\u00b0) is?","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":6,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448488,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 14:06:19","updated_at":"2018-05-02 21:02:12","questionName":"What is the equation used to work out the internal energy (U)? ","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":14,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448570,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 15:25:00","updated_at":"2018-05-02 21:02:12","questionName":"What value must remain constant to calculate \u0394G\u00b0?","questionTimeSeconds":"0","questionTimeMinutes":"1","questionImagePath":null,"position":11,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448567,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 15:22:00","updated_at":"2018-05-02 21:02:12","questionName":"For non-spontaneous reactions, \u0394G is...","questionTimeSeconds":"0","questionTimeMinutes":"1","questionImagePath":null,"position":9,"explanation":"This is the same for \u0394G\u00b0.","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448555,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 15:11:25","updated_at":"2018-05-02 21:02:12","questionName":"What is the value of the gas constant (R) used to calculate the standard Gibbs free energy (\u0394G\u00b0)","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":5,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448583,"quiz_id":"23041","answer_id":null,"answerType_id":"2","created_at":"2018-05-02 15:44:58","updated_at":"2018-05-02 21:02:12","questionName":"Match the thermodynamic laws with their definitions","questionTimeSeconds":"0","questionTimeMinutes":"3","questionImagePath":null,"position":13,"explanation":"","question_score_id":null,"lang":"","questionAudioPath":null},{"id":448564,"quiz_id":"23041","answer_id":null,"answerType_id":"0","created_at":"2018-05-02 15:18:20","updated_at":"2018-05-02 21:02:12","questionName":"The standard Gibb's free energy (\u0394G\u00b0) is used...","questionTimeSeconds":"0","questionTimeMinutes":"3","questionImagePath":null,"position":7,"explanation":"\u0394G\u00b0 = -RTLn(K) is used to find the standing Gibb's free energy of an equilibrium reaction whereby the equilibrium constant is K. Pressure and temperature must be constant to work this out. ","question_score_id":null,"lang":"","questionAudioPath":null}]

block

Some endothermic reactions are spontaneous.

Select the correct answer(s).  

(0/0)

Explanation

In most cases, endothermic reactions are non-spontaneous but there are some cases where they are spontaneous.

---

True

False

none

All exothermic reactions are spontaneous

Select the correct answer(s).  

(0/0)

Explanation

It is spontaneous in majority of the cases but there some exothermic reactions can also be non-spontaneous

---

True

False

none

What must be constant to work out ΔG?

Select the correct answer(s).  

(0/0)

---

Volume

Pressure

Ideal gas constant

Temperature

none

Gibb’s free energy (ΔG) is calculated using the equation?

Select the correct answer(s).  

(0/0)

---

ΔG = ΔH - TΔS

ΔG = ΔH - TΔS

ΔG = RTLn(K)

ΔG = -RTLn(K)

none

What equation is used to work out enthalpy (ΔH)?

Select the correct answer(s).  

(0/0)

---

ΔH = ∑ E (products) + ∑ E (reactants)

ΔH = ∑ E (products) - ∑ E (reactants)

ΔH = ∑ E (reactants) + ∑ E (products)

ΔH = ∑ E (reactants) - ∑ E (products)

none

Gibb’s free energy (ΔG) for spontaneous reactions is calculated using the equation?

Select the correct answer(s).  

(0/0)

---

ΔG = ΔH + TΔS

ΔG = TΔS - ΔH

ΔG = ΔH - TΔS

ΔG = ΔH - ΔTΔS

none

In spontaneous reactions ΔG is...

Select the correct answer(s).  

(0/0)

Explanation

This is the same for ΔG°.

---

ΔG > 0 kJ mol-1

ΔG < 0 kJ mol-1

none

Fill in the blank with the words: large, small.

Fill in the blanks  

(0/0)

Check All Answers

---

ΔG° in spontaneous reactions have a

Check Answer

equilibrium constant (K). ΔG° in non-spontaneous reactions have a

Check Answer

equilibrium constant (K).

---

Check All Answers

none

The equation used to calculate the standard Gibb's free energy (ΔG°) is?

Select the correct answer(s).  

(0/0)

---

ΔG° = TΔS - ΔH

ΔG° = ΔH - TΔS

ΔG° = RTLn(K)

ΔG° = -RTLn(K)

none

What is the equation used to work out the internal energy (U)?

Select the correct answer(s).  

(0/0)

---

ΔU = q + w

ΔU = q/w

ΔU = q * w

ΔU = w/q

none

What value must remain constant to calculate ΔG°?

Select the correct answer(s).  

(0/0)

---

Temperature

Pressure

Volume

Mass

none

For non-spontaneous reactions, ΔG is...

Select the correct answer(s).  

(0/0)

Explanation

This is the same for ΔG°.

---

ΔG < 0 kJ mol-1

ΔG > 0 kJ mol-1

none

What is the value of the gas constant (R) used to calculate the standard Gibbs free energy (ΔG°)

Select the correct answer(s).  

(0/0)

---

8.365 atm L K-1 mol-1

0.082 atm L K-1 mol-1

8.314 atm L K-1 mol-1

0.082 J mol-1 K-1

8.314 J mol-1 K-1

8.365 J mol-1 K-1

none

Match the thermodynamic laws with their definitions

Match the text (click and drag)   

(0/0)

Check Order Of Answers

---

Match the text
First law of thermodynamics
Second law of thermodynamics
Third law of thermodynamics

Click and drag
states that any spontaneous process MUST lead to an increase in the disorder and therefore increase the entropy
states that the internal energy (U) is the total energy of a thermodynamic system
states that the entropy of a perfectly crystalline material is zero at T = 0 K

Check Order of Answers

none

The standard Gibb's free energy (ΔG°) is used...

Select the correct answer(s).  

(0/0)

Explanation

ΔG° = -RTLn(K) is used to find the standing Gibb's free energy of an equilibrium reaction whereby the equilibrium constant is K. Pressure and temperature must be constant to work this out.

---

When Reaction is spontaneous

Reaction is occuring at an inconsistent pressure and temperature.

When reaction is occuring at a constant pressure and temperasure.

When Reaction is non-spontaneous

In relation to the equilibrium constant (K)