Homework Answers
Correct option: E
From the second law of thermodynamics,
Where, 
= change in Gibbs free energy, 
= change in enthalpy, 
= change in entropy of the reaction.
Now,
is negative for a spontaneous process.
For exothermic reactions,
is negative.
Now, if
is also negative, then 
is positive.
Given these conditions, if 
then,
is positive.
Hence, all exothermic reactions are not spontaneous.
Add Answer to:
5. Which of the following statements regarding spontaneous changes is false? A. Spontaneity is favored when...
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,...
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.
2. Decide whether each of the following statements is true or false. If false, rewrite it...
2. Decide whether each of the following statements is true or false. If false, rewrite it to make it true. a. Entropy of the universe increases in all spontaneous reactions. wo False If entropy is bw enough it con be spontaneous, b. Reactions with a negative free energy change (A-Gº <0) are product-favored and occur with rapid transformation of reactants to products. True c. An exothermic reaction will always be spontaneous. I NO when AH is negative the reaction can...
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. All spontaneous chemical reactions have no heat of reaction. Entropy and temperature are multiplied in the Gibbs free energy. Spontaneity is decreased by negative entropy changes. Spontaneity is decreased by positive enthalpy changes. The heat of reaction at constant volume is always equal to the change in the enthalpy. I put FALSE, FALSE, TRUE, FALSE, TRUE.
Which of the following statements about diffusion is false? a) Diffusion is the spontaneous movement a...
Which of the following statements about diffusion is false? a) Diffusion is the spontaneous movement a solute from a region of low to high concentration b) Passive diffusion results in the net movement of molecules from high to low concentration c) Diffusion is driven by a tendency of molecules to seek a state of increased disorder d) Diffusion through membranes is decreased by the presence of cholesterol
Which of the following statements about physical and chemical changes is FALSE? In a physical change,...
Which of the following statements about physical and chemical changes is FALSE? In a physical change, matter does not change its composition. O Inachemical change, matter changes its composition. O Phase changes are always physical changes. O Chemical reactions are chemical changes. None of these are false
Which of the following statements is FALSE? When Keq << 1, the reverse reaction is favored...
Which of the following statements is FALSE? When Keq << 1, the reverse reaction is favored and the reactants greatly exceed the products at equilibrium Keq >> 1 implies that the reaction is very fast at producing products When Keq ≈ 1, neither the forward or reverse reaction is strongly favored, and about the same amount of reactants and products exist at equilibrium When Keq >> 1, the forward reaction is favored and products greatly exceed reactants at equilibrium
QUESTION 23 Which of the following statements is incorrect? a. A spontaneous process occurs under specified...
QUESTION 23 Which of the following statements is incorrect? a. A spontaneous process occurs under specified conditions without outside intervention. Ob. AGsys --TASuniv c. A nonspontaneous process occurs only if the surroundings continuously supply energy to the system. d. The relationship between AGⓇ and K at 25°C is: if K< 1, AG° <0. e. A spontaneous change may be exothermic or endothermic.
TRUE/FALSE QUESTIONS Question 1 Spontaneous processes proceed without outside intervention once initiated. Yet, spontaneous processes are...
TRUE/FALSE QUESTIONS Question 1 Spontaneous processes proceed without outside intervention once initiated. Yet, spontaneous processes are not always rapid. Group of answer choices True False Question 2 The sign of ∆G tells us how fast a reaction (or a process) might occur. Group of answer choices True False Question 3 The sublimation of dry ice (solid CO2), where CO2(s) LaTeX: \longrightarrow ⟶ CO2(g), has ∆S>0, ∆H>0, and ∆G<0 at 25°C. Group of answer choices True False Question 4 If a...
2. Decide whether each of the following statements is true or false. If false, rewrite it to make it true. a. Entropy of the universe increases in all spontaneous reactions. wo False If entropy is bw enough it con be spontaneous, b. Reactions with a negative free energy change (A-Gº <0) are product-favored and occur with rapid transformation of reactants to products. True c. An exothermic reaction will always be spontaneous. I NO when AH is negative the reaction can...
Which of the following statements about physical and chemical changes is FALSE? In a physical change, matter does not change its composition. O Inachemical change, matter changes its composition. O Phase changes are always physical changes. O Chemical reactions are chemical changes. None of these are false
QUESTION 23 Which of the following statements is incorrect? a. A spontaneous process occurs under specified conditions without outside intervention. Ob. AGsys --TASuniv c. A nonspontaneous process occurs only if the surroundings continuously supply energy to the system. d. The relationship between AGⓇ and K at 25°C is: if K< 1, AG° <0. e. A spontaneous change may be exothermic or endothermic.
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago