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
User TheScientist
Wall
Recent activity
All questions
All answers
Ask a Question
Questions by TheScientist
0
votes
1
answer
28
views
What is the enthalpy change for the reaction:2H2(g) + O2(g) → 2H2O(l)Given the following bond enthalpy values: H-H bond = +436 kJ/mol O=O bond = +495 kJ/mol H-O bond = -463 kJ/molExpress your answer in kJ/mol.
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
31
views
What is the enthalpy change for the reaction: 2H2(g) + O2(g) → 2H2O(l) Given that the standard enthalpy of formation for H2O(l) is -285.8 kJ/mol, and the standard enthalpy of formation for H2(g) and O2(g) are 0 kJ/mol.
asked
Mar 1
in
Chemical thermodynamics
0
votes
1
answer
33
views
What is the enthalpy change in kilojoules for the reaction:2H2(g) + O2(g) → 2H2O(l)given that the standard enthalpy of formation for liquid water is -285.8 kJ/mol, and the standard enthalpy of formation for hydrogen gas and oxygen gas are 0 kJ/mol?
asked
Mar 1
in
Chemical thermodynamics
0
votes
1
answer
26
views
What is the enthalpy change for the reaction when 2 moles of hydrogen gas react with 1 mole of oxygen gas to form 2 moles of water vapor? (Hint: Use the balanced chemical equation and standard enthalpies of formation for each compound involved.)
asked
Mar 1
in
Chemical reactions
0
votes
1
answer
28
views
What is the enthalpy change for the reaction 2CuO(s) + C(s) → 2Cu(s) + CO2(g) if the enthalpy of formation for CuO(s) is -159.2 kJ/mol, the enthalpy of formation for CO2(g) is -393.5 kJ/mol, and the standard enthalpy of formation for Cu(s) is 0?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
32
views
What is the enthalpy change for the isomerization of butene-1 to butene-2, given that the standard enthalpy of formation for butene-1 and butene-2 are -123 kJ/mol and -131 kJ/mol respectively?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
28
views
What is the enthalpy change for the isomerization of 2-butene to 1-butene at constant pressure, given that the standard enthalpy of formation of 2-butene is -118.0 kJ/mol and the standard enthalpy of formation of 1-butene is -133.9 kJ/mol?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
33
views
What is the enthalpy change for the ionization of a 1 mol/L solution of hydrochloric acid (HCl) at 25 °C, given that the pH of the solution is 1.5?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
33
views
What is the enthalpy change for the hydrolysis reaction of sucrose (C12H22O11) in water, given that the molar heat of combustion for sucrose is -5632 kJ/mol and the standard enthalpy of formation for liquid water is -285.83 kJ/mol?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
32
views
What is the enthalpy change for the hydrolysis of 10 grams of sucrose (C12H22O11) in an aqueous solution, assuming complete reaction and a standard state, given that the enthalpy of hydrolysis of sucrose is -564.9 kJ/mol?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
31
views
Sure! Here's a question:Calculate the enthalpy change for the following chemical reaction: 2H2 (g) + O2 (g) → 2H2O (l) Given the following enthalpy changes: 2H2 (g) + O2 (g) → 2H2O (g) ΔH = -483.6 kJ/mol 2H2O (g) → 2H2O (l) ΔH = -40.7 kJ/mol
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
32
views
What is the enthalpy change for the dissolution of 5 grams of solid NaOH in 100 mL of water, given that the final temperature of the solution is 25°C? The heat capacity of the solution is 4.18 J/g°C.
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
31
views
What is the enthalpy change for the dissolution of 4.5 grams of NaOH in water, given that the molar enthalpy of dissolution is -44.5 kJ/mol?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
35
views
Sure! Here is a question for the student to solve:What is the enthalpy change for the dissolution of 10 grams of potassium nitrate (KNO3) in 100 grams of water at 25°C? Given the molar enthalpy of dissolution for KNO3 to be -34.01 kJ/mol.
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
30
views
What is the enthalpy change for the dissolution of 10 grams of NaCl in 100 mL of water at 25°C given that the enthalpy of solution of NaCl is -3.9 kJ/mol?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
35
views
What is the enthalpy change for the complete combustion of 2 moles of propane (C3H8) in the presence of excess oxygen gas (O2)?
asked
Mar 1
in
ThermoChemistry
0
votes
1
answer
34
views
What is the enthalpy change for the combustion of propane?
asked
Mar 1
in
Chemical thermodynamics
0
votes
1
answer
37
views
Sure! Here's a precise problem for the student:The combustion of 2.50 grams of methane (CH4) gave off 119.1 kJ of heat. Calculate the enthalpy change for the combustion of one mole of methane at constant pressure.
asked
Mar 1
in
Chemical reactions
0
votes
1
answer
41
views
What is the enthalpy change for the combustion of one mole of methane (CH4) gas to form carbon dioxide (CO2) gas and water (H2O) vapor at standard temperature and pressure (STP)?
asked
Mar 1
in
Chemical reactions
0
votes
1
answer
39
views
What is the enthalpy change for the combustion of methane gas in a bomb calorimeter?
asked
Mar 1
in
Physical Chemistry
Page:
« prev
1
...
21
22
23
24
25
26
27
28
29
...
93
next »
37.4k
questions
37.2k
answers
2
comments
14.7k
users
Categories
All categories
Science
(12.0k)
Psychology
(10.5k)
Chemistry
(14.9k)
Welcome to Sarvan Science Q&A, where you can ask questions and receive answers from other members of the community.
...