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Enthalpy Change
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Questions (197)
HNO3 (g) + 4H2 (g) ---> NH3 (g) + 3H2O (g) deltaH = -637 kJ
Calculate the enthalpy change when one mole of hydrogen reacts; and
4 answers
asked by
Anonymous
1,280 views
Calculate the enthalpy change, ∆H in kJ, for the reaction H2O(s) → H2(g) + 1/2O2(g)
Use the following: A. –291.9 kJ B.
3 answers
asked by
Angela
3,175 views
Given the thermochemical equation 2SO2 + O2 → 2SO3, ΔH°rxn = -198 kJ/mol, what is the standard enthalpy change for the
4 answers
asked by
Chris
4,078 views
estimate the enthalpy change for each of the following reaction:
a) H2C=O(g)+HCl(g .....> H3C-O-Cl(g) b)H2O2(g)+2CO(g).....>
4 answers
asked by
oluchi
1,475 views
Given the following data, calculate the enthalpy change for the reaction
S(s)+ O2(g)->SO2(g) S(s)+(3/2)O2(g)->SO3(g) H=-395.2 kJ
3 answers
asked by
Alisa
2,345 views
Given that:
2Al(s)+(3/2)O2(g)--->Al2O3(s) change in H(rxn)= -1601 kJ/mol 2Fe(s)+(3/2)O2(g)--->Fe2O3(s) change in H(rxn)= -821
4 answers
asked by
Lucy
1,918 views
The enthalpy change for the reaction between hydrochloric acid and sodium hydroxide is -56 kJ mol¹. Therefore
Α the reaction is
3 answers
asked by
-
70 views
Hydrazine, N2H4, is a colorless liquid used in rocket fuel. What is the enthalpy change for the process in which hydranzine is
3 answers
asked by
Austin
3,581 views
Back again with another problem :)
How do you calculate the enthalpy change, in kJ/mol for the reaction of copper(II) sulfate?
3 answers
asked by
Autumn
1,213 views
What is the enthalpy change (in kJ) for burning 49.0 g of methyl alcohol?
I tried this question and got the wrong answer of
3 answers
asked by
Anonymous
987 views
Calculate the value of DHo for the reaction 2 CH4 (g) -> C2H6 (g) + H2 (g) given the following thermochemical equations:
C2H2 (g)
4 answers
asked by
timmy
1,148 views
What is the enthalpy change (in kJ/mol) for the following process?
Na+(g) + Br-(g) --> NaBr (s) Hint: use the Born-Haber cycle
3 answers
asked by
Crystal
2,415 views
Consider the following two thermochemical equations
N2+2.5O2-> N2O5(s) Delta H=xkJ N2+2.5O2-> N2O5(g) Delta H=ykJ The enthalpy
4 answers
asked by
Bob
925 views
Can someone make sure I did this write!
What is the molar change in enthalpy when 100 g of ice is heated from -18.2 C to -72 C
4 answers
asked by
Libby
745 views
The chemical reaction representing production of water gas is as follows:
C(s)+H2O(l)=CO(g)+H2(g) calculate the enthalpy change
3 answers
asked by
bennett
896 views
the enthalpy change under standard conditions for which of the reaction below would be equal to the delta H of NaOH(s)?
3 answers
asked by
abbaakko
287 views
What is the enthalpy change when 100.0 g octane (C8H18, MW = 114.23 g/mol) is combusted at 25C?
3 answers
asked by
Nicole
348 views
Given that 4NH3+5O2-4NO+6H2O ΔH= -906kJ.
What is the Enthalpy change for NO +3/2H2O - NH3 +5/2 O2
3 answers
asked by
Wendy
989 views
Adding 2.00 g of Mg metal to 95.0 mL of 1.00 M HCl in a coffee-cup calorimeter leads to a temperature increase of 9.2°C
If the
3 answers
asked by
Anonymous
1,670 views
The value of Change in heat for the reaction below is -790 KJ. Calculate the enthalpy change accompanying the reaction of .95 g
2 answers
asked by
Anonymous
964 views
The enthalpy change for the following reaction is -483.6 kJ:
2H2(g) + O2(g) = 2H2O(g) Therefore, the enthalpy change for the
3 answers
asked by
danny
2,935 views
The value for ΔH° for the reaction below is -72 kJ. How many kJ of heat are released when 1.0 mol of HBr is formed in this
3 answers
asked by
danny
1,530 views
Find the enthalpy change of the following reactions 2C+2H2O---> CO2+CH4
Using the following reactions with their change in H
3 answers
asked by
Anonymous
849 views
Consider the following chemical reaction:
2H2O2(L) �¨ 2H2O(L) + O2(g) ƒ¢Hrxn = -196.1 kJ How much heat is released if 2 moles
3 answers
asked by
peterson
864 views
Given 1.01 g of H2 in the reaction H2 + 1/2 O2 = H2O. The Delta H for solution is 143 kJ. What is the delta H for the reaction?
3 answers
asked by
Roger
457 views
When a 3.90-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter, the temperature drops
4 answers
asked by
Kevin
850 views
Consider the following data:
* NH3(g) yields 1/2 N2(g) + 3/2 H2(g) delta H = 46kJ * 2 H2(g) + O2(g) yields 2 H2o(g) delta H =
2 answers
asked by
Shellby
1,121 views
Consider the following data:
C(s) + O2(g) → CO₂(g) AH-394 kJ mol-¹ Pb(s) + 202(g) → PbO(s) AH-217 kJ mol-¹ PbO(s) + CO(g)
3 answers
asked by
-
40 views
RXN #1: H2 (g) + O2 (g) --> H2O2 (l) ; delta-H =?
Calculate the enthalpy change (delta-H1) for the reaction above (RXN #1) using
5 answers
asked by
Ally
5,827 views
When 15.3g of NaNO3 was dissolved in water inside a constant pressure
calorimeter, the temperature fell from 25.00 °C to 21.56
3 answers
asked by
Stephen
1,098 views
The enthalpy change for the reaction between hydrochloric acid and sodium hydroxide is -56 kJ mol¹. Therefore
a)the reaction is
3 answers
asked by
-
71 views
When 20.8 g of calcium chloride, CaCl2, was dissolved in water in a calorimeter, the temperature rose from 25.0°C to 37.1°C.
2 answers
asked by
Glenna
816 views
Analyze the figure shown of a salt (sodium chloride) dissociating in a solvent
(water). Is the overall change in enthalpy
1 answer
asked anonymously
55 views
Calculate the enthalpy change that occurs when 1kg of benzene vapour at 150℃ and 100KPa condense to a solid at -20℃ and
1 answer
asked by
Teniola
395 views
(DrBob222 please help me)
A sample of 1.97 grams of Z is dissolved into 500 grams of water which is in a styrofoam coffee cup.
3 answers
asked by
Rachel
2,002 views
I know I pored this already, but I for it to mention the assumption. See below.
A calorimeter contains 30.0 mL of water at 15.0
2 answers
asked by
Student
522 views
What is the enthalpy change when 24.0 g of water is cooled from 40.0°C to 5.70°C? _________kJIs the process endothermic or
1 answer
asked by
mara
448 views
I need a recap of how to do the question below. I just need the basic guidelines:
The enthalpy change for the reaction 2H2(g)+O2
9 answers
asked by
Todd
559 views
If the following reaction:
NO(g) + 1/2O2(g) NO2(g) has the following enthalpy change: H° = -56 kJ/mol What is the enthalpy of
2 answers
asked by
Morgan
710 views
What is the change in enthalpy for an isothermal, isentropic compression of an ideal gas from 2 atm to 12 atm?
1 answer
asked by
Carl
300 views
What is the enthalpy change (∆H) for the above reaction when the amount of Cl2(g) involved in the reaction is doubled?
2 answers
asked by
Anonymous
569 views
NH4NO3(s) right arrow NH4+(aq) + NO3−(aq)
In order to measure the enthalpy change for this reaction, 1.21 g of NH4NO3 is
4 answers
asked by
Philip Golden
1,469 views
Need help with this practice problem. I got the values for the gas to liquid and liquid to solid. Don't know how to do the rest?
1 answer
asked by
Chemkid
485 views
Need help with this practice problem. I got the values for the gas to liquid and liquid to solid. Don't know how to do the rest?
2 answers
asked by
Chemkid
542 views
Solid phosphorous is found in two forms: white phosphorous (P4) and red phosphorous (P). White phosphorous is the standard
2 answers
asked by
Zack
880 views
The reaction between hydrogen and chlorine gases gives hydrogen chloride gas in the following reaction:
H2(g) + Cl2(g) = 2HCl(g)
3 answers
asked by
john
995 views
H2(g)+Cl2(g)=2HCL(g)
it is found experimentally that 1 mole of H2 gas react with 1 mole of CL2 gas at constant temperature &
4 answers
asked by
john
577 views
A calorimeter contains 20.0 of water at 12.5 . When 2.20 of (a substance with a molar mass of 59.0 ) is added, it dissolves via
2 answers
asked by
JOSH
1,010 views
What is ΔGo at 1000 oC for the following reaction?
CaCO3 (s) CaO (s) + CO2 (g)
1 answer
asked by
laquisha
1,031 views
Carbon monoxide reacts with oxygen to form
carbon dioxide by the following reaction: 2 CO(g) + O2(g) → 2 CO2(g) ∆H for this
3 answers
asked by
Joe King
2,402 views
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Parent Categories (18)
Biochemistry
Calorimetry
Chemical Reactions
Chemistry
Enthalpy
Gas Laws
Heat of reaction
Heat Transfer
Reaction Energy
Reaction stoichiometry
Reaction thermodynamics
Reactions
Stoichiometry
Thermochemical Equations
Thermochemical reactions
Thermochemistry
Thermodynamics
Types of Phosphorous