Login
Remember
Register
Science Q&A Sarvan.Net
All Activity
Q&A
Questions
Hot!
Unanswered
Tags
Categories
Users
Ask a Question
About Us
XML Sitemap
Terms of Service
Ask a Question
Recent questions in Chemistry
0
votes
1
answer
67
views
Calculate the enthalpy change for the hydrolysis of 0.025 moles of ethyl acetate (C4H8O2) in the presence of excess water, given that the enthalpy of reaction is -56.0 kJ/mol.
asked
Jan 23
in
ThermoChemistry
by
JaneenBarrie
(
1.6k
points)
0
votes
1
answer
69
views
Calculate the enthalpy change for the hydration of MgSO4 using the following data:MgSO4(s) → MgSO4(aq) ΔH1 = 44.5 kJ/molMgSO4(aq) + 7H2O(l) → MgSO4 • 7H2O(s) ΔH2 = -63.2 kJ/mol.
asked
Jan 23
in
ThermoChemistry
by
MistyReagan2
(
1.4k
points)
0
votes
1
answer
67
views
Calculate the enthalpy change for the fusion of 50.0 g of ice at its melting point (0 °C). The molar enthalpy of fusion of water is 6.01 kJ/mol.
asked
Jan 23
in
ThermoChemistry
by
EttaRide758
(
1.3k
points)
0
votes
1
answer
62
views
Calculate the enthalpy change for the following reaction:2H2O2(aq) → 2H2O(l) + O2(g)Using the following information:2H2O(l) + 105.2 kJ → 2H2(g) + O2(g)2H2(g) + O2(g) → 2H2O2(aq) + 484.4 kJ
asked
Jan 23
in
Chemical reactions
by
LuzMccrary7
(
2.5k
points)
0
votes
1
answer
67
views
Calculate the enthalpy change for the following reaction, using Hess's Law:2H2S(g) + 3O2(g) → 2H2O(l) + 2SO2(g)Given the following enthalpy changes: 2H2(g) + O2(g) → 2H2O(l) ΔH1 = -484 kJ2SO2(g) + O2(g) → 2SO3(g) ΔH2 = -198 kJ2H2(g) + S(s) → H2S(g) ΔH3 = +25kJ
asked
Jan 23
in
Chemical reactions
by
BelenPickard
(
2.3k
points)
0
votes
1
answer
61
views
Calculate the enthalpy change for the following reaction using Hess's Law: 2SO3(g) → 2SO2(g) + O2(g)Given the following enthalpy changes:2SO3(g) + ΔH1 → 2SO2(g) + O2(g); ΔH1 = 198.2 kJ/molSO2(g) + 1/2O2(g) + ΔH2 → SO3(g); ΔH2 = -98.9 kJ/mol
asked
Jan 23
in
Chemical reactions
by
CarmaC633252
(
1.7k
points)
0
votes
1
answer
43
views
Calculate the enthalpy change for the following reaction using Hess's Law calculations:2H2S(g) + 3O2(g) → 2H2O(l) + 2SO2(g)Given the following information:2H2(g) + O2(g) → 2H2O(l) ΔH1 = -484 kJ/mol2S(s) + 3O2(g) → 2SO3(g) ΔH2 = -791 kJ/mol2H2(g) + S(s) → 2H2S(g) ΔH3 = -36 kJ/mol
asked
Jan 23
in
ThermoChemistry
by
DanialCheste
(
1.6k
points)
0
votes
1
answer
82
views
Calculate the enthalpy change for the following polymerization reaction: 2 C2H4 (g) → C4H8 (g) Given the following bond enthalpies: C-H = 413 kJ/mol, C-C = 348 kJ/mol, C=C = 611 kJ/mol Assume all reactants and products are gases at 298 K and 1 atm.
asked
Jan 23
in
ThermoChemistry
by
AntonyKnotts
(
1.8k
points)
0
votes
1
answer
13
views
Calculate the enthalpy change for the following combustion reaction:C2H6(g) + 7/2 O2(g) --> 2CO2(g) + 3H2O(l)Using the following reactions and their corresponding enthalpies of formation:C2H6(g) + 3 1/2 O2(g) --> 2CO2(g) + 3H2O(l) ΔH°f = -1560 kJ/mol2H2(g) + O2(g) --> 2H2O(l) ΔH°f = -484 kJ/mol.
asked
Jan 23
in
ThermoChemistry
by
QTHGenevieve
(
1.7k
points)
0
votes
1
answer
76
views
Calculate the enthalpy change for the following chemical reaction:2H2(g) + O2(g) -> 2H2O(l) given the following bond enthalpy values:H-H bond energy = 436 kJ/mol O=O bond energy = 498 kJ/mol H-O bond energy = 464 kJ/mol
asked
Jan 23
in
Chemical thermodynamics
by
FloridaOShan
(
2.0k
points)
0
votes
1
answer
66
views
Calculate the enthalpy change for the following chemical reaction: 2NH3(g) + 3O2(g) → 2NO(g) + 3H2O(l) Given the following enthalpy values: ΔH°f (NH3) = −46.11 kJ/molΔH°f (O2) = 0 kJ/molΔH°f (NO) = 90.3 kJ/molΔH°f (H2O) = −285.8 kJ/mol
asked
Jan 23
in
Chemical thermodynamics
by
ShavonneSalc
(
1.8k
points)
0
votes
1
answer
64
views
Calculate the enthalpy change for the dissolution of 5.00 g of sodium hydroxide (NaOH) in 100.0 g of water (H2O). The temperature change was measured to be -3.45°C. Given that the specific heat of water is 4.18 J/g°C and the density of water is 1.00 g/mL. (Assume that the heat evolved from NaOH is absorbed by the water.)
asked
Jan 23
in
ThermoChemistry
by
FloridaOShan
(
2.0k
points)
0
votes
1
answer
101
views
Calculate the enthalpy change for the dissolution of 5.00 g of potassium chloride (KCl) in 100 mL of water. Given that the specific heat capacity of the resulting solution is 4.18 J/g°C, and its temperature increases from 25.0°C to 30.0°C. The molar mass of KCl is 74.55 g/mol, and the enthalpy of hydration of K+ and Cl- ions is -716 and -364 kJ/mol, respectively.
asked
Jan 23
in
ThermoChemistry
by
WandaBalsill
(
1.3k
points)
0
votes
1
answer
78
views
Calculate the enthalpy change for the dissolution of 5 grams of sodium chloride in 50 mL of water if the temperature of the solution decreases from 25 °C to 21 °C. The density of the solution is 1.0 g/mL and the specific heat capacity of the solution is 4.18 J/g°C. (Assume the heat exchange between the solution and the surroundings is negligible)
asked
Jan 23
in
ThermoChemistry
by
CarmaC633252
(
1.7k
points)
0
votes
1
answer
54
views
Calculate the enthalpy change for the dissolution of 10g of NaCl in 100g of water, given that the initial and final temperatures are 25°C and 20°C respectively. The molar mass of NaCl is 58.44 g/mol and the specific heat capacity of water is 4.18 J/(g°C).
asked
Jan 23
in
ThermoChemistry
by
SenaidaDelac
(
1.8k
points)
0
votes
1
answer
72
views
Calculate the enthalpy change for the dissolution of 10.0 grams of sodium chloride (NaCl) in 100 mL of water at 25°C. The density of water is 1.00 g/mL and the heat capacity of the solution is 4.18 J/g°C. The molar mass of NaCl is 58.44 g/mol and its enthalpy of dissolution is -3.9 kJ/mol.
asked
Jan 23
in
ThermoChemistry
by
AlmedaGooch6
(
1.7k
points)
0
votes
1
answer
64
views
Calculate the enthalpy change for the dissolution of 10 grams of sodium hydroxide in excess water, given that the solution formed has a final temperature of 25°C, and the specific heat capacity of the solution is 4.184 J/(g°C). The molar enthalpy of dissolution of NaOH is -44 kJ/mol. Assume that the density of the solution is equal to that of water.
asked
Jan 23
in
ThermoChemistry
by
RafaelBarrow
(
1.7k
points)
0
votes
1
answer
54
views
Calculate the enthalpy change for the dissolution of 10 g of sodium hydroxide in 100 g of water at a temperature of 25°C, given that the final temperature of the solution is 26.5°C and the specific heat capacity of the solution is 4.18 J g⁻¹ K⁻¹. (Assume that the heat released is absorbed by the solution and there is no heat lost to the surroundings.)
asked
Jan 23
in
ThermoChemistry
by
Beatris09Q13
(
1.9k
points)
0
votes
1
answer
59
views
Calculate the enthalpy change for the dissolution of 10 g of NaOH in 100 mL of water at 25°C. The molar heat of dissolution of NaOH is -44.51 kJ/mol.
asked
Jan 23
in
ThermoChemistry
by
LouiePartrid
(
1.8k
points)
0
votes
1
answer
60
views
Calculate the enthalpy change for the desorption of water vapor from a silica gel desiccant using the following information:Mass of silica gel desiccant = 5.0 gInitial temperature of silica gel desiccant and water vapor = 25.0 °CFinal temperature after desorption of water vapor = 40.0 °CSpecific heat capacity of silica gel = 1.16 J/g°CHeat absorbed by the calorimeter = -222.4 JAssume all heat absorbed by calorimeter comes solely from the desorption of water vapor.
asked
Jan 23
in
ThermoChemistry
by
ClydeC545764
(
2.2k
points)
Page:
« prev
1
...
690
691
692
693
694
695
696
697
698
...
745
next »
37.4k
questions
37.2k
answers
2
comments
9.7k
users
Categories
All categories
Science
(12.0k)
Psychology
(10.5k)
Chemistry
(14.9k)
Organic Chemistry
(663)
Inorganic Chemistry
(568)
Physical Chemistry
(613)
Analytical Chemistry
(657)
BioChemistry
(719)
Polymer Chemistry
(720)
Medicinal Chemistry
(680)
Environmental Chemistry
(684)
ElectroChemistry
(379)
Computational Chemistry
(681)
Materials Chemistry
(641)
Surface Chemistry
(704)
Coordination Chemistry
(632)
Quantum Chemistry
(684)
ThermoChemistry
(573)
PhotoChemistry
(731)
Chemical kinetics
(639)
Chemical thermodynamics
(560)
Chemical equilibrium
(318)
Chemical bonding
(656)
Chemical reactions
(412)
Chemical synthesis
(532)
Chemical engineering
(614)
Chemical education
(836)
Welcome to Sarvan Science Q&A, where you can ask questions and receive answers from other members of the community.
Recent questions in Chemistry
37.4k
questions
37.2k
answers
2
comments
9.7k
users
...