Homework Answers
Answer -
The entropy of a reaction is Positive if there are more number of gases molecules on product side and it is Negative if there are more number of Gas molecules on reactant side.
2 Mg (s) + O2
(g)
2 MgO (s)
Number of moles of gas on reactant side = 1
Number of moles of gas on product side = 0
So, 
S for this reaction is Negative. and the reason is there are more
number of moles of gas on reactant side than the product
side
OPTION D is the correct answer
Add Answer to:
Question 21 of 39 What will the sign on AS be for the following reaction and...
Thermodynamics Practice Problems 1. Predict the sign of AS.(positive or negative) for the following reactions a...
Thermodynamics Practice Problems 1. Predict the sign of AS.(positive or negative) for the following reactions a 2 Mg(s) +,(@) 2 Mgo (s) AS b. CH206(s) → 2C,H,OH(I) + 2003(g) AS c. 2 NH3(g) + CO2(g) → H2O(l) + NH CONH3(aq) AS d. Cu(s) (at 100°C) → Cu(s) (at 25°C) AS 2. Which two variables can indicate if a reaction is spontaneous or not? 3. The second law of thermodynamics tells us that: a Energy is conserved. b. The entropy of...
17) Which of the following is TRUE? A) Stoichiometry allows prediction of how much of the reactants are necessary t...
17) Which of the following is TRUE? A) Stoichiometry allows prediction of how much of the reactants are necessary to form a given amount of product. B) Stoichiometry shows the numerical relationship between chemical quantities in a balanced chemical equation. C) Stoichiometry allows prediction of the amounts of products that form in a chemical reaction based on the amounts of reactants D) All of the above are true. E) None of the above are true. 18) Diatomic O2 can react...
un plase uansion from a liquid to a gas • an increase in the number of...
un plase uansion from a liquid to a gas • an increase in the number of moles of a gas during a chemical reaction EXAMPLE 17.1 Predicting the Sign of Entropy Change Predict the sign of AS for each process: (a) H2O(g) → H2O(1) (b) Solid carbon dioxide sublimes. (c) 2 N2O(g) —> 2 N2(8) + O2(g) SOLUTION (a) Since a gas has a greater entropy than a liquid, the entropy decreases and AS is negative. (b) Since a solid...
1.a) What is the sign of the entropy change for the following reaction? Note: You do...
1.a) What is the sign of the entropy change for the following
reaction? Note: You do not need the standard entropy values
2Zn (s) + O2 (g) ---> 2ZnO (s)
answer
a) 0 (Zero)
b) <0 (Negative)
c) No change
d)> 0 (Positive)
2.c)
ASO = Ensº(product ) - EnS°(reactant ) rxn O 173.6 K-mol -1893 W/K-mol O 6165 /K-mal 0 -1736 K-mol
Question 21 4 pts Consider the following reaction: 2 Mg + O2 → 2 MgO AH...
Question 21 4 pts Consider the following reaction: 2 Mg + O2 → 2 MgO AH rxn=-1203 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 4 moles of Mg. 0-2406 kJ 0-601.5 kJ O-1203 kJ O-4812 kJ none of the above
31. For the reaction shown, calculate how many grams of oxy- gen form when each quantity...
31. For the reaction shown, calculate how many grams of oxy- gen form when each quantity of reactant completely reacts. 2 HgO(s) —> 2Hg(l) + O2(g) 0-521- (a) 2.13 g Hgo (b) 6.77 g Hgo (c) 1.55 kg Hgo (d) 3.87 mg Hgo 22. For each of the reactions, calculate how many grams of th 34. 33. For each of the reactions, calculate how many grams of the product form when 2.4 g of the reactant in color completely reacts....
ReviewI ConstantsI Periodic Table Part A Magnesium oxide can be made by heating magnesium metal in...
ReviewI ConstantsI Periodic Table Part A Magnesium oxide can be made by heating magnesium metal in the presence of the oxygen The balanced equation for the reaction is Determine the limiting reactant for the reaction. 2 Mg(s) +O2(g) 2 MgO(s) Mg(s) 02 (g) When 10.2 g Mg is allowed to react with 10.4 g O2, 12.0 g MgO is collected You may want to reference (Pages 146-151) section 4.3 while completing this problem. Previous Answer Correct The limiting reactant is...
(Show your work and prove or disprove each multiple choice answer. Circle the best answers. )...
(Show your work and prove or disprove each multiple choice answer. Circle the best answers. ) Which of the following statements about the chemical reaction show below is true? 2 Mg(s) + O2(g) —> 2 MgO(s) a. Magnesium is the limiting reagent. b. Reacting 6 moles of oxygen gas will consume 3 moles of magnesium c. Two grams of solid magnesium will produce 2 grams of magnesium oxide d. Reacting 3 moles of solid magnesium will produce 3 moles of...
E 21 (1 Point) Which of the following represent the reaction between MgO and H2O? a)...
E 21 (1 Point) Which of the following represent the reaction between MgO and H2O? a) 2MgO + H20 → 2MgOH + 12 02 b) MgO + H2O + Mg(OH)2 MgO + H2O → Mg + H2O2 d) MgO + H2O → MgH2 + O2 А Св
IV) Which is the best explanation for the negative sign of ASº in the following reaction?...
IV) Which is the best explanation for the negative sign of ASº in the following reaction? CaSO4(s) → Ca2+(aq) + SO42- (aq) AS° =-143 J mol-1 K -1 (A) There are more ways of arranging the Ca2+ and SO42- ions in aqueous solution than in the crystal lattice. (B) Solid CaSO4 is a network covalent solid, whereas it separates into ions in aqueous solution. (C) Aqueous Ca2+ and SO42- ions are tightly solvated, decreasing the number of ways of arranging...
Thermodynamics Practice Problems 1. Predict the sign of AS.(positive or negative) for the following reactions a 2 Mg(s) +,(@) 2 Mgo (s) AS b. CH206(s) → 2C,H,OH(I) + 2003(g) AS c. 2 NH3(g) + CO2(g) → H2O(l) + NH CONH3(aq) AS d. Cu(s) (at 100°C) → Cu(s) (at 25°C) AS 2. Which two variables can indicate if a reaction is spontaneous or not? 3. The second law of thermodynamics tells us that: a Energy is conserved. b. The entropy of...
17) Which of the following is TRUE? A) Stoichiometry allows prediction of how much of the reactants are necessary to form a given amount of product. B) Stoichiometry shows the numerical relationship between chemical quantities in a balanced chemical equation. C) Stoichiometry allows prediction of the amounts of products that form in a chemical reaction based on the amounts of reactants D) All of the above are true. E) None of the above are true. 18) Diatomic O2 can react...
un plase uansion from a liquid to a gas • an increase in the number of moles of a gas during a chemical reaction EXAMPLE 17.1 Predicting the Sign of Entropy Change Predict the sign of AS for each process: (a) H2O(g) → H2O(1) (b) Solid carbon dioxide sublimes. (c) 2 N2O(g) —> 2 N2(8) + O2(g) SOLUTION (a) Since a gas has a greater entropy than a liquid, the entropy decreases and AS is negative. (b) Since a solid...
1.a) What is the sign of the entropy change for the following
reaction? Note: You do not need the standard entropy values
2Zn (s) + O2 (g) ---> 2ZnO (s)
answer
a) 0 (Zero)
b) <0 (Negative)
c) No change
d)> 0 (Positive)
2.c)
ASO = Ensº(product ) - EnS°(reactant ) rxn O 173.6 K-mol -1893 W/K-mol O 6165 /K-mal 0 -1736 K-mol
Question 21 4 pts Consider the following reaction: 2 Mg + O2 → 2 MgO AH rxn=-1203 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 4 moles of Mg. 0-2406 kJ 0-601.5 kJ O-1203 kJ O-4812 kJ none of the above
31. For the reaction shown, calculate how many grams of oxy- gen form when each quantity of reactant completely reacts. 2 HgO(s) —> 2Hg(l) + O2(g) 0-521- (a) 2.13 g Hgo (b) 6.77 g Hgo (c) 1.55 kg Hgo (d) 3.87 mg Hgo 22. For each of the reactions, calculate how many grams of th 34. 33. For each of the reactions, calculate how many grams of the product form when 2.4 g of the reactant in color completely reacts....
ReviewI ConstantsI Periodic Table Part A Magnesium oxide can be made by heating magnesium metal in the presence of the oxygen The balanced equation for the reaction is Determine the limiting reactant for the reaction. 2 Mg(s) +O2(g) 2 MgO(s) Mg(s) 02 (g) When 10.2 g Mg is allowed to react with 10.4 g O2, 12.0 g MgO is collected You may want to reference (Pages 146-151) section 4.3 while completing this problem. Previous Answer Correct The limiting reactant is...
E 21 (1 Point) Which of the following represent the reaction between MgO and H2O? a) 2MgO + H20 → 2MgOH + 12 02 b) MgO + H2O + Mg(OH)2 MgO + H2O → Mg + H2O2 d) MgO + H2O → MgH2 + O2 А Св
IV) Which is the best explanation for the negative sign of ASº in the following reaction? CaSO4(s) → Ca2+(aq) + SO42- (aq) AS° =-143 J mol-1 K -1 (A) There are more ways of arranging the Ca2+ and SO42- ions in aqueous solution than in the crystal lattice. (B) Solid CaSO4 is a network covalent solid, whereas it separates into ions in aqueous solution. (C) Aqueous Ca2+ and SO42- ions are tightly solvated, decreasing the number of ways of arranging...
Most questions answered within 3 hours.
-
A pair of fair dice is tossed. Let X denote the larger of the
two numbers...
asked 15 seconds ago -
What are the variety of forms of products dispensed with aerosol
spray?
asked 4 minutes ago -
Which one of the following statements is true about C++
keywords?
a. A keyword can have...
asked 4 minutes ago -
Pyruvate Kinase, an allosteric enzyme, accelerates the
conversion of phosphoenolpyruvate to pyruvate.
1) Draw curves describing...
asked 7 minutes ago -
question 1
Which of the following is an example of a bottom-up technique
for developing promotional...
asked 24 minutes ago -
1)In FM modulation, what aspect of the carrier is being
modulated?
2)Explain in your own words,...
asked 20 minutes ago -
Andromeda Galaxy, M31, is considered a sister galaxy to Milky
Way galaxy. One similarirty is their...
asked 26 minutes ago -
How does temperature affect ADH during enzyme
kinetics?
asked 34 minutes ago -
A $1000 par value convertible bond has a conversion price of
$25. It is currently selling...
asked 42 minutes ago -
Write a java program that declares 10 element array (of type
integers), creates and initializes the...
asked 40 minutes ago -
import java.util.Arrays;
import java.util.Random;
import java.util.Scanner;
/**
* TODO Write a summary of the role of...
asked 45 minutes ago -
Sodium hydroxide is a strong base and ammonium hydroxide is a
weak base. Which of the...
asked 50 minutes ago