When ammonium nitrate (NH4NO3) dissolves in water, the solution feels cool. Which statements are true? Select...
When ammonium nitrate (NH4NO3) dissolves in water, the solution feels cool. Which statements are true? Select all that apply.
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The process is endothermic. |
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The attractive forces between solvent and solute particles are weaker than between the particles in the pure substances. |
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The process is exothermic. |
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The attractive forces between solvent and solute particles are stronger than between the particles in the pure substances. |
Homework Answers
The process is endothermic
The attractive forces between solvent and solute particles are weaker than between the particles in the pure substances.
Reason: Since the solution feels cold it indicates that it absorbs energy from the surrounding hence it is a endothermic process and the interaction between solute - solute and solvent-solvent particles are endothermic processes and the interaction between solute -solvent are exothermic process
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When ammonium nitrate (NH4NO3) dissolves
in water, the solution feels cool. Which statements are true?
Select...
The dissolution of ammonium nitrate (NH4NO3) in water is a classic example of a solute that...
The dissolution of ammonium nitrate (NH4NO3) in water is a classic example of a solute that has an endothermic enthalphy of solution (ΔHsolution). What is (are) the "driving force" (driving forces) for the dissolution of NH4NO3? Formation of ion-dipole interactions only. Increasing entropy only. Formation of ion-dipole interactions and decreasing entropy. Formation of dispersion interactions and increasing entropy. Formation of dispersion interactions only
When ammonium nitrate dissolves in water at constant pressure, the temperature of the solution falls. Which...
When ammonium nitrate dissolves in water at constant pressure, the temperature of the solution falls. Which of the following statements must be incorrect? A. The process is exothermic B. The process is product-favoured C. ∆S>0 D. ∆G<0 E. ∆H>0
There are a smallpackage of ammonium nitrate (NH4NO3) in water. When the inside bag is broken,...
There are a smallpackage of ammonium nitrate (NH4NO3) in water. When the inside bag is broken, the solute dissolves in the water. This dissolution requires energy and the water cools and freezes. I have done many experiments to find the best packs, and the market leader uses 300 g of the solute and 300 mL of water. It reaches a final temperature of -2 C. If I assume the dissolution processis so fast that it can be modelled as adiabatic,...
When a 5.26-g sample of solid ammonium nitrate dissolves in 52.5 g of water in a...
When a 5.26-g sample of solid ammonium nitrate dissolves in 52.5
g of water in a coffee-cup calorimeter (see above figure) the
temperature falls from 24.00 oC to 17.20 oC.
Calculate H in kJ/mol NH4NO3 for
the solution process.
NH4NO3(s)
NH4+(aq) + NO3-(aq)
The specific heat of water is 4.18 J/g-K.
Hsolution = _________kJ/mol
NH4NO3.
When a 4.25 g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter, the temperatur...
When a 4.25 g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter, the temperature drops from 22.0 degrees C to 16.9 degrees C. Calculate Delta H kJ/mol NH4NO3 for the solution process NH4NO3 ( s) yields NH4 (there is a plus sign above the four)(aq) + ^ + NO3(negative sign above the three) (aq) Assume that the specific heat of the solution is the same as that of pure water. Express your answer...
Which of the following statements regarding the solution process is incorrect? Multiple Choice When a solution...
Which of the following statements regarding the solution process is incorrect? Multiple Choice When a solution is formed from an ionic compound, the anions and cations are evenly distributed throughout the solution When a polar covalent compound dissolves in water, dipole-dipole interactions take place between the water molecules and the solute molecules. A nonpolar compound such as hexane, C6H14, forms London dispersion forces with a nonpolar solute, such as 12 during the solution process. O The solution process is always...
(1): When a 1.48-g sample of solid ammonium nitrate dissolves in 56.4 g of water in...
(1):
When a 1.48-g sample of solid ammonium nitrate dissolves in 56.4
g of water in a coffee-cup calorimeter (see above figure) the
temperature falls from 22.00 oC to 20.09 oC.
Calculate H in kJ/mol
NH4NO3 for the solution process.
NH4NO3(s)
NH4+(aq) +
NO3-(aq)
The specific heat of water is 4.18 J/g-K.
Hsolution
= __kJ/mol NH4NO3.
(2):
The reaction S2O82-(aq) + 3
I-(aq)
2 SO42-(aq) + I3-(aq)
was studied at a certain temperature with the following
results:
Experiment
[S2O82-(aq)] (M)...
PART 1 of 3: Consider two ionic compounds that dissolve fully in water at room temperature....
PART 1 of 3: Consider two ionic compounds that dissolve fully in water at room temperature. You an experiment and determine the following: * Compound A has stronger solute-solute attractions than solute-solvent attractions. * Compound B has stronger solute-solvent attractions than solute-solute attractions. Which of the following best describes the ΔH solution for Compound A and Compound B, respectively? ANSWER CHOICES: 1.) Both processes are endothermic, but Compound A is more endothermic 2.) Exothermic, endothermic 3.) Both processes are exothermic,...
Which of the following statements is true about the compressibility factor (Z)? When Z is greater than 0, attractive f...
Which of the following statements is true about the compressibility factor (Z)? When Z is greater than 0, attractive forces between the particles dominates. When Z is less than 0, attractive forces between the particles dominates. Z steadily increases for an ideal gas. Z equals 24.79 L bar for an ideal gas. Repulsive forces between particles cause Z to be less than 0 at high pressures.
Choose the following statements which best identify the differences between melting and freezing. Select all that...
Choose the following statements which best identify the differences between melting and freezing. Select all that apply: Melting point is not affected by the attractive forces in a solid while freezing point is. Melting is the change from a solid to a liquid, while freezing is the change from a liquid to a solid. O Melting has a positive AH value while freezing has a negative AH value. O Melting is exothermic while freezing is endothermic.
When a 5.26-g sample of solid ammonium nitrate dissolves in 52.5
g of water in a coffee-cup calorimeter (see above figure) the
temperature falls from 24.00 oC to 17.20 oC.
Calculate H in kJ/mol NH4NO3 for
the solution process.
NH4NO3(s)
NH4+(aq) + NO3-(aq)
The specific heat of water is 4.18 J/g-K.
Hsolution = _________kJ/mol
NH4NO3.
Which of the following statements regarding the solution process is incorrect? Multiple Choice When a solution is formed from an ionic compound, the anions and cations are evenly distributed throughout the solution When a polar covalent compound dissolves in water, dipole-dipole interactions take place between the water molecules and the solute molecules. A nonpolar compound such as hexane, C6H14, forms London dispersion forces with a nonpolar solute, such as 12 during the solution process. O The solution process is always...
(1):
When a 1.48-g sample of solid ammonium nitrate dissolves in 56.4
g of water in a coffee-cup calorimeter (see above figure) the
temperature falls from 22.00 oC to 20.09 oC.
Calculate H in kJ/mol
NH4NO3 for the solution process.
NH4NO3(s)
NH4+(aq) +
NO3-(aq)
The specific heat of water is 4.18 J/g-K.
Hsolution
= __kJ/mol NH4NO3.
(2):
The reaction S2O82-(aq) + 3
I-(aq)
2 SO42-(aq) + I3-(aq)
was studied at a certain temperature with the following
results:
Experiment
[S2O82-(aq)] (M)...
Choose the following statements which best identify the differences between melting and freezing. Select all that apply: Melting point is not affected by the attractive forces in a solid while freezing point is. Melting is the change from a solid to a liquid, while freezing is the change from a liquid to a solid. O Melting has a positive AH value while freezing has a negative AH value. O Melting is exothermic while freezing is endothermic.
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