Question 1

Many molecular collisions do not result in chemical reactions. Why?

Accepted Answer

A)  The colliding molecules are not the correct chemicals. 
B)  The colliding molecules do not have sufficient energy. 
C)  The colliding molecules do not have the correct orientations. 
D)  All of these are reasons many molecular collisions do not result in chemical reactions. 
A)  The colliding molecules are not the correct chemicals. 
B)  The colliding molecules do not have sufficient energy. 
C)  The colliding molecules do not have the correct orientations. 
D)  All of these are reasons many molecular collisions do not result in chemical reactions.

Question 2

In a particular chemical reaction, four bonds are broken and three bonds are formed. Based only on this information, which of the following is true?

Accepted Answer

A)  The reaction has a high activation energy. 
B)  The reaction is endothermic. 
C)  The reaction is exothermic. 
D)  We cannot determine which of the statements is true. 
A)  The reaction has a high activation energy. 
B)  The reaction is endothermic. 
C)  The reaction is exothermic. 
D)  We cannot determine which of the statements is true.

Question 3

How does a decrease in temperature affect an exothermic reaction that has not reached equilibrium?

Accepted Answer

A)  The rate of reaction slows, and less product is formed. 
B)  The rate of reaction slows, but more product is formed. 
C)  The rate of reaction speeds up, but less product is formed. 
D)  The rate of reaction speeds up, and more product is formed. 
A)  The rate of reaction slows, and less product is formed. 
B)  The rate of reaction slows, but more product is formed. 
C)  The rate of reaction speeds up, but less product is formed. 
D)  The rate of reaction speeds up, and more product is formed.

Question 4

For which of the following reactions is it important that the species collide with the correct orientation?

Accepted Answer

A)  2H2(g) + O2(g) → 2H2O(l) 
B)  HCl(g) + H2O(l) → H2O+(aq) + Cl-(aq) 
C)  both of these 
D)  neither of these 
A)  2H2(g) + O2(g) → 2H2O(l) 
B)  HCl(g) + H2O(l) → H2O+(aq) + Cl-(aq) 
C)  both of these 
D)  neither of these

Many molecular collisions do not result in chemical reactions. Why?

In a particular chemical reaction, four bonds are broken and three bonds are formed. Based only on this information, which of the following is true?

How does a decrease in temperature affect an exothermic reaction that has not reached equilibrium?

For which of the following reactions is it important that the species collide with the correct orientation?

Matter, Energy, and Measurement

Atoms

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

Filters

Exam 7: Reaction Rates and Chemical Equilibrium

Many molecular collisions do not result in chemical reactions. Why?

In a particular chemical reaction, four bonds are broken and three bonds are formed. Based only on this information, which of the following is true?

How does a decrease in temperature affect an exothermic reaction that has not reached equilibrium?

For which of the following reactions is it important that the species collide with the correct orientation?

Matter, Energy, and Measurement

Atoms

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

Filters