When a 7.82-g sample of solid potassium hydroxide dissolves in 100.0 g of water in a...
When a 7.82-g sample of solid potassium hydroxide dissolves in
100.0 g of water in a coffee-cup calorimeter, the temperature rises
from 22.7 °C to 59.2 °C. What is ΔH for the dissolution of KOH in
water, as shown below?
KOH(s) → K+(aq) + OH−(aq)
Assume that all solutions have the same specific heat as water.
Homework Answers
Add Answer to:
When a 7.82-g sample of solid potassium hydroxide dissolves in
100.0 g of water in a...
5.55 When a 6.50-g sample of solid sodium hydroxide dissolves in 100.0 g of water in...
5.55 When a 6.50-g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter (Figure 5.18), the temperature rises from 21.6 °C to 37.8 °C. Calculate ?? (in kJ/mol NaOH) for the solution process NaOH(s)-Na"(aq) + OH-(aq) Assume that the specific heat of the solution is the same as that of pure water.
When a 7.46-g sample of solid sodium hydroxide dissolves in 36.9 g of water in a...
When a 7.46-g sample of solid sodium hydroxide dissolves in 36.9 g of water in a coffee-cup calorimeter (see above figure) the temperature rises from 24.00 oC to 68.26 oC. Calculate H in kJ/mol NaOH for the solution process. NaOH(s) Na+(aq) + OH-(aq) The specific heat of water is 4.18 J/g-K. Hsolution = . kJ/mol NaOH.
When a 9.55 g sample of solid NaOH dissolves in 100.0 g of water in a...
When a 9.55 g sample of solid NaOH dissolves in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 23.6C to 47 for the solution process. (Assume that the specific heat of the solution is the same as that of pure water.) . .4 °C. Calculate AH (in kJ/mol NaOH)
2. When a 6.50 g sample of solid sodium hydroxide dissolves in 100.0 g of water...
2. When a 6.50 g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter (figure 5.18 in your textbook), the temperature rises from 21.6 to 37.8 C. a. Calculate the quantity of heat (in kJ) released in the reaction (the dissolving of NaOH). b. Using the result from part a, calculate the enthalpy of the reaction for the solution of NaOH in kJ/mol NaOH.
When a 5.12-g sample of solid sodium nitrate dissolves in 31.1 g of water in a...
When a 5.12-g sample of solid sodium nitrate dissolves in 31.1 g
of water in a coffee-cup calorimeter (see above figure) the
temperature falls from 25.00 oC to 16.37 oC.
Calculate H in kJ/mol NaNO3 for the solution
process.
NaNO3(s)
Na+(aq) + NO3-(aq)
The specific heat of water is 4.18 J/g-K.
We were unable to transcribe this imageWe were unable to transcribe this imagethermometer stirrer coffee cups containing reaction mixture When a 5.12-g sample of solid sodium nitrate dissolves in...
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution...
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 0.97 g of KOH(s) are dissolved in 105.70 g of water, the temperature of the solution increases from 22.45 to 24.74 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.57 J/°C....
The salt potassium hydroxide dissolves in water according to the reaction: KOH(s) K+(aq) + OH-(aq) (a)...
The salt potassium hydroxide dissolves in water
according to the reaction:
KOH(s) K+(aq)
+ OH-(aq)
(a) Calculate the standard enthalpy change ΔH° for this reaction,
using the following data:
KOH(s) = -424.8 kJ
mol-1
K+(aq)
= -252.4 kJ mol-1
OH-(aq)
= -230.0 kJ mol-1
kJ
(b) Calculate the temperature reached by the solution formed when
8.05 g of KOH is dissolved in
0.162 L of water at 21.8 °C.
Approximate the heat capacity of the solution by the heat capacity...
6.4 g of potassium hydroxide (56.1 g/mol) dissolves in 105 g of water. The temperature of...
6.4 g of potassium hydroxide (56.1 g/mol) dissolves in 105 g of
water. The temperature of the solution increases by 13.97
oC. Calculate the ΔHsoln in kJ/mol
for potassium hydroxide (the specific heat capacity of the solution
is 4.2 J g-1oC-1).
KOH(s)
K+(aq) + OH-(aq)
thermometer coffee cups containing reaction mixture When a 7.89-9 sample of solid potassium chlorate dissolves in...
thermometer coffee cups containing reaction mixture When a 7.89-9 sample of solid potassium chlorate dissolves in 32.0 g of water in a coffee-cup calorimeter (see above figure) the temperature falls from 20.00 °C to 3.899 °C. Calculate AH in kl/mol KCIOy for the solution process. KCIO,(s) - K*(aq) + CIO,'(aq) The specific heat of water is 4.18 3/ok Aucution - Kl/mol KCO,
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.
5.55 When a 6.50-g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter (Figure 5.18), the temperature rises from 21.6 °C to 37.8 °C. Calculate ?? (in kJ/mol NaOH) for the solution process NaOH(s)-Na"(aq) + OH-(aq) Assume that the specific heat of the solution is the same as that of pure water.
When a 9.55 g sample of solid NaOH dissolves in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 23.6C to 47 for the solution process. (Assume that the specific heat of the solution is the same as that of pure water.) . .4 °C. Calculate AH (in kJ/mol NaOH)
2. When a 6.50 g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter (figure 5.18 in your textbook), the temperature rises from 21.6 to 37.8 C. a. Calculate the quantity of heat (in kJ) released in the reaction (the dissolving of NaOH). b. Using the result from part a, calculate the enthalpy of the reaction for the solution of NaOH in kJ/mol NaOH.
When a 5.12-g sample of solid sodium nitrate dissolves in 31.1 g
of water in a coffee-cup calorimeter (see above figure) the
temperature falls from 25.00 oC to 16.37 oC.
Calculate H in kJ/mol NaNO3 for the solution
process.
NaNO3(s)
Na+(aq) + NO3-(aq)
The specific heat of water is 4.18 J/g-K.
We were unable to transcribe this imageWe were unable to transcribe this imagethermometer stirrer coffee cups containing reaction mixture When a 5.12-g sample of solid sodium nitrate dissolves in...
6.4 g of potassium hydroxide (56.1 g/mol) dissolves in 105 g of
water. The temperature of the solution increases by 13.97
oC. Calculate the ΔHsoln in kJ/mol
for potassium hydroxide (the specific heat capacity of the solution
is 4.2 J g-1oC-1).
KOH(s)
K+(aq) + OH-(aq)
thermometer coffee cups containing reaction mixture When a 7.89-9 sample of solid potassium chlorate dissolves in 32.0 g of water in a coffee-cup calorimeter (see above figure) the temperature falls from 20.00 °C to 3.899 °C. Calculate AH in kl/mol KCIOy for the solution process. KCIO,(s) - K*(aq) + CIO,'(aq) The specific heat of water is 4.18 3/ok Aucution - Kl/mol KCO,
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.
Most questions answered within 3 hours.
-
(63
#14)
which of the following statments best describes how chamging
the concentration of the substances...
asked 26 minutes ago -
In the following reaction, which element is undergoing
oxidation: Na2SO3 + N2O --> N2 + Na2SO4...
asked 1 hour ago -
Which of the following pairs of ions have the same electron
configuration?
I: Br− and Se2−...
asked 3 hours ago -
The Foremost Composite Materials Company is planning a two-day
sales conference for October 19-20. The conference...
asked 4 hours ago -
3) Illustrate the observed pattern of relatedness of organisms
versus adaptations to specific conditions. This means...
asked 4 hours ago -
In winter a lake has a 0.35 m thick ice layer over 1.10 m of
water....
asked 5 hours ago -
Assuming the following has been encrypted with a Vigenere cipher
below, use the method(s) and assumptions...
asked 5 hours ago -
How would I use switch statements to write a program that will
take an input of...
asked 5 hours ago -
Imagine a reaction in which methane gas combusts at a constant
pressure of 1 atm and...
asked 5 hours ago -
Two parallel wires (each 12 m in length) are separated by a
distance of 0.065 m...
asked 5 hours ago -
Suppose there were three masses at the corner of uniform
equilateral triangle. The masses are m1...
asked 5 hours ago -
Situation: A building that is 618 m above the ground floor. How
many times would a...
asked 5 hours ago