Which of the following would involve the largest production of heat per mole?
a)the burning of gasoline
b)the evaporation of water
c)the fission of uranium
d)the freezing of water
e)the rusting of iron
Is it C)
Which of the following would involve the greatest absorption of heat per mole?
a)the burning of gasoline
b)the evaporation of water
c)the fission of uranium
d)the freezing of water
e)the rusting of iron
Is it B)
When solid ammonium chloride is added to water, the solution feels cold to the hand. Which statement best describes the observation?
a)NH4CL-> NH4CL+ 34kJ
b)The reaction is exothermic
c)NH4CL-> NH4CL DeltaH= 34kJ
d)The system releases heat, so it feels colder
e)The boiling point is increased so it feels colder
Is it c)
Which of the following statements is not true?
a)Delta H is the difference in enthalpy between reactants and products
b)Delta H may be written part of the equation
c)Delta H is negative for an endothermic reaction
d) A reaction consumes heat if Delta H is positve
e) Delta H equals the heat transferred to or from the surroundings.
Is it C?
Can somebody prove/double check if my answers are correct
Which of the following would involve the largest production of heat per mole?
a)the burning of gasoline
b)the evaporation of water
c)the fission of uranium
d)the freezing of water
e)the rusting of iron
Is it C)
I would think so.
Which of the following would involve the greatest absorption of heat per mole?
a)the burning of gasoline
b)the evaporation of water
c)the fission of uranium
d)the freezing of water
e)the rusting of iron
Is it B)
I think B is the only endothermic reaction listed.
When solid ammonium chloride is added to water, the solution feels cold to the hand. Which statement best describes the observation?
a)NH4CL-> NH4CL+ 34kJ
b)The reaction is exothermic
c)NH4CL-> NH4CL DeltaH= 34kJ
d)The system releases heat, so it feels colder
e)The boiling point is increased so it feels colder
Is it c)
yes
Which of the following statements is not true?
a)Delta H is the difference in enthalpy between reactants and products
b)Delta H may be written part of the equation
c)Delta H is negative for an endothermic reaction
d) A reaction consumes heat if Delta H is positve
e) Delta H equals the heat transferred to or from the surroundings.
Is it C?
yes
Sure, let's double-check your answers!
1) For the largest production of heat per mole, the correct answer is C) the fission of uranium. It releases an enormous amount of heat during the process.
2) For the greatest absorption of heat per mole, the correct answer is B) the evaporation of water. It requires a significant amount of energy to break the intermolecular bonds and convert liquid water into vapor.
3) For the observation of solid ammonium chloride added to water feeling cold, the correct answer is d) The system releases heat, so it feels colder. The dissolution of ammonium chloride in water is an exothermic process, meaning it releases heat to the surroundings.
4) For the statement that is not true, the correct answer is c) Delta H is negative for an endothermic reaction. In reality, Delta H is positive for an endothermic reaction, as it absorbs heat from the surroundings.
So, your answers are:
1) C
2) B
3) d
4) c
Great job! Your answers are correct.
Yes, let's go through each question to double-check your answers:
1) Which of the following would involve the largest production of heat per mole?
a) the burning of gasoline
b) the evaporation of water
c) the fission of uranium
d) the freezing of water
e) the rusting of iron
Your answer: c) the fission of uranium
Correct! The fission of uranium releases a significant amount of energy, making it the process that involves the largest production of heat per mole.
2) Which of the following would involve the greatest absorption of heat per mole?
a) the burning of gasoline
b) the evaporation of water
c) the fission of uranium
d) the freezing of water
e) the rusting of iron
Your answer: b) the evaporation of water
Correct! The evaporation of water requires a large amount of energy input, which makes it the process that involves the greatest absorption of heat per mole.
3) When solid ammonium chloride is added to water, the solution feels cold to the hand. Which statement best describes the observation?
a) NH4Cl -> NH4Cl + 34 kJ
b) The reaction is exothermic
c) NH4Cl -> NH4Cl ΔH = 34 kJ
d) The system releases heat, so it feels colder
e) The boiling point is increased, so it feels colder
Your answer: c) NH4Cl -> NH4Cl ΔH = 34 kJ
Incorrect. The correct answer is d) The system releases heat, so it feels colder. When solid ammonium chloride dissolves in water, it is an exothermic process, which means heat is released. This heat transfer from the system to the surroundings makes the solution feel cold to the hand.
4) Which of the following statements is not true?
a) ΔH is the difference in enthalpy between reactants and products
b) ΔH may be written as part of the equation
c) ΔH is negative for an endothermic reaction
d) A reaction consumes heat if ΔH is positive
e) ΔH equals the heat transferred to or from the surroundings
Your answer: c) ΔH is negative for an endothermic reaction
Correct! The statement c) is not true. ΔH is positive for an endothermic reaction, as it represents the heat absorbed from the surroundings by the system. In an exothermic reaction, ΔH is negative, indicating heat is released by the system into the surroundings.
Overall, you got three out of four questions correct. Well done!
Certainly! Let's go through each question and verify your answers.
1) Which of the following would involve the largest production of heat per mole?
a) the burning of gasoline
b) the evaporation of water
c) the fission of uranium
d) the freezing of water
e) the rusting of iron
Your answer: c) the fission of uranium
That is correct! Uranium fission releases a significant amount of energy per mole compared to the other options mentioned.
2) Which of the following would involve the greatest absorption of heat per mole?
a) the burning of gasoline
b) the evaporation of water
c) the fission of uranium
d) the freezing of water
e) the rusting of iron
Your answer: b) the evaporation of water
That is correct! The process of water evaporation requires the most amount of heat to break intermolecular forces and convert liquid water into water vapor.
3) When solid ammonium chloride is added to water, the solution feels cold to the hand. Which statement best describes the observation?
a) NH4CL -> NH4CL + 34kJ
b) The reaction is exothermic
c) NH4CL -> NH4CL DeltaH = 34kJ
d) The system releases heat, so it feels colder
e) The boiling point is increased so it feels colder
Your answer: c) NH4CL -> NH4CL DeltaH = 34kJ
That is not correct. The correct answer is b) The reaction is exothermic. When solid ammonium chloride dissolves in water, the process is exothermic, which means heat is released, making the solution and the surroundings feel colder.
4) Which of the following statements is not true?
a) Delta H is the difference in enthalpy between reactants and products
b) Delta H may be written part of the equation
c) Delta H is negative for an endothermic reaction
d) A reaction consumes heat if Delta H is positive
e) Delta H equals the heat transferred to or from the surroundings.
Your answer: c) Delta H is negative for an endothermic reaction
That is not correct. The correct answer is d) A reaction consumes heat if Delta H is positive. In an exothermic reaction, Delta H is negative, indicating heat is released. In an endothermic reaction, Delta H is positive, indicating heat is absorbed by the system.
So, out of your answers, 1 and 2 were correct, while 3 and 4 were incorrect.