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)
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6.4 g of potassium hydroxide (56.1 g/mol) dissolves in 105 g of
water. The temperature of...
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...
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 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.
Question 6 (0.5 marks) Two solids, 4.20 g of sodium hydroxide and 5.00 g potassium hydroxide...
Question 6 (0.5 marks) Two solids, 4.20 g of sodium hydroxide and 5.00 g potassium hydroxide are added to 200.0 mL of water in a calorimeter. If the initial temperature of the water is 20.0 °C, Asolution H (NaOH) = - 44.3 kJ/mol, and solution H (KOH) = -56.0 kJ/mol, calculate the final temperature of the solution. You may need to obtain some data from your textbook when answering this question. Assume the specific heat capacity of the solution is...
Question 6 (0.5 marks) Two solids, 4.20 g of sodium hydroxide and 5.00 g potassium hydroxide...
Question 6 (0.5 marks) Two solids, 4.20 g of sodium hydroxide and 5.00 g potassium hydroxide are added to 200.0 mL of water in a calorimeter. If the initial temperature of the water is 20.0 °C, Asolution H (NaOH) = -44.3 kJ/mol, and solution (KOH) = -56.0 kJ/mol, calculate the final temperature of the solution. You may need to obtain some data from your textbook when answering this question. Assume the specific heat capacity of the solution is the same...
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 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...
17. (10 pts) Solid potassium metal reacts with liquid water to produce aqueous potassium hydroxide and...
17. (10 pts) Solid potassium metal reacts with liquid water to produce aqueous potassium hydroxide and hydrogen gas as shown by the BALANCED chemical equation below. When a 3.50 g piece of K(s) is added to 150. g of water in an insulated container, the temperature of the liquid INCREASES from 25.0 °C to 65.8 °C. Calculate the enthalpy of reaction (4FH) for the reaction in the forward direction. Water has a heat capacity (Cp) of 4.18 J/(8 °C). Assume...
When a 3.13-g sample of liquid sulfuric acid dissolves in 33.6 g of water in a...
When a 3.13-g sample of liquid sulfuric acid dissolves in 33.6
g of water in a coffee-cup calorimeter (see above figure) the
temperature rises from 22.00 oC to 41.81 oC.
Calculate H in kJ/mol H2SO4 for
the solution process.
H2SO4(l)
2 H+(aq) + SO42-(aq)
The specific heat of water is 4.18 J/g-K.
Hsolution =____ kJ/mol
H2SO4.
The AH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol....
The AH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When a 13.9-g sample of NaOH dissolves in 250.0 g of water in a coffee-cup calorimeter, the temperature increases from 23.0 °C to °C. Assume that the solution has the same specific heat as liquid water. Given the data in the table below, calculate the AH° for the combustion of ammonia NH3(g) + O2(g) → NO(g) + H2O(1) AH?” (kJ/mol) - 286 90 Substance...
Question 6 (0.5 marks) Two solids, 4.20 g of sodium hydroxide and 5.00 g potassium hydroxide are added to 200.0 mL of water in a calorimeter. If the initial temperature of the water is 20.0 °C, Asolution H (NaOH) = - 44.3 kJ/mol, and solution H (KOH) = -56.0 kJ/mol, calculate the final temperature of the solution. You may need to obtain some data from your textbook when answering this question. Assume the specific heat capacity of the solution is...
Question 6 (0.5 marks) Two solids, 4.20 g of sodium hydroxide and 5.00 g potassium hydroxide are added to 200.0 mL of water in a calorimeter. If the initial temperature of the water is 20.0 °C, Asolution H (NaOH) = -44.3 kJ/mol, and solution (KOH) = -56.0 kJ/mol, calculate the final temperature of the solution. You may need to obtain some data from your textbook when answering this question. Assume the specific heat capacity of the solution is the same...
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 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...
17. (10 pts) Solid potassium metal reacts with liquid water to produce aqueous potassium hydroxide and hydrogen gas as shown by the BALANCED chemical equation below. When a 3.50 g piece of K(s) is added to 150. g of water in an insulated container, the temperature of the liquid INCREASES from 25.0 °C to 65.8 °C. Calculate the enthalpy of reaction (4FH) for the reaction in the forward direction. Water has a heat capacity (Cp) of 4.18 J/(8 °C). Assume...
The AH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When a 13.9-g sample of NaOH dissolves in 250.0 g of water in a coffee-cup calorimeter, the temperature increases from 23.0 °C to °C. Assume that the solution has the same specific heat as liquid water. Given the data in the table below, calculate the AH° for the combustion of ammonia NH3(g) + O2(g) → NO(g) + H2O(1) AH?” (kJ/mol) - 286 90 Substance...
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