Questions LLC
Login
or
Sign Up
Ask a New Question
Enthalpy Change
Page 3
Questions (197)
The enthalpy change was determined for the
following reactions; Ca (s) + CO2 (g) + ½ O2 (g ) → CaCO3 (s) ΔH = -812.8 kJ/mo l
2 answers
asked by
Anonymous
635 views
Calculate the value of the change in enthalpy(H) when the temperature of 1 mole of a monatomic gas is increased from 25C to
1 answer
asked by
J
341 views
Estimate the enthalpy change for the following reaction
OH(g)+CH4(g)==>CH3(g)+H2O(g)
1 answer
asked by
West
463 views
N2 + O2 = 2NO enthalpy change = +180.6kJ
c) what is the enthalpy change for the formation of one mole of nitrogen monoxide? d)
2 answers
asked by
Farah
953 views
The combustion of 1 mole of C2H5OH (Ethanol) in a bomb calorimeter produces 1364 kJ/mol at 25 degree Calcium. What is the value
2 answers
asked by
Laura
551 views
Calculate the enthalpy change, for the process in which 40.0g of water is converted from liquid at 12.8 degrees C to vapor at
1 answer
asked by
Anonymous
445 views
S(rhombic)+O2(g)--->SO2(g)
change in H(rxn)= -296.06 kJ/mol S(monoclinic)+O2(g)--->SO2(g) change in H(rxn)= -296.36 kJ/mol 1.
4 answers
asked by
Lucy
1,423 views
S(rhombic)+O2(g)--->SO2(g)
change in H(rxn)= -296.06 kJ/mol S(monoclinic)+O2(g)--->SO2(g) change in H(rxn)= -296.36 kJ/mol 1.
2 answers
asked by
Lucy
642 views
A sample consisting of 0.025 mol of a solid compound is placed inside a metal cylinder. The cylinder was immersed in a water
2 answers
asked by
Nora
584 views
1. What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438
1 answer
asked by
Nevaeh
1,253 views
What is the enthalpy change to roast one mol of copper 2 sulfide?
3 answers
asked anonymously
15 views
Could anyone name the enthalpy change by name AND if it is exothermic or endothermic (why it is endo or exo)
1 mol C(3)H(8)(l) to
1 answer
asked by
Anonymous
459 views
I have a few questions to ask, since I was absent from school and I do not really understand the calorimetry problems.
1) When a
7 answers
asked by
Bonn
944 views
please help its due at 5
When 0.671 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 109C is
1 answer
asked by
tweety
388 views
When 1.000 mole of ammonia reacts with oxygen, the enthalpy change for the reaction is –906 kJ.The balanced chemical equation
10 answers
asked anonymously
49 views
M grams of sucrose give enthalpy change of △H kJ/mol on combustion. What is the effect on enthalpy change when the mass of the
6 answers
asked anonymously
56 views
The enthalpy change for the reaction
2 H2 + O2 > 2 H20 is -571.6 kJ. Determine the enthalpy change for the decomposition of 24.0g
6 answers
asked by
Mike
2,258 views
Calculate the standard enthalpy change of the reaction
ClO(g)+O3->ClO2(g)+O2(g)
4 answers
asked by
Anonymous
1,859 views
Calculate the enthalpy change (delta H) in kJ for the following reaction.
2Al(s) + Fe2O3 (s) ==> 2 Fe(s) + Al2O3(s) use enthalpy
3 answers
asked by
Kim
1,817 views
4 NH3(g) + 5 O2(g) 4 NO(g) + 6 H2O(g)
If standard enthalpy change is -906.2 kJ, what quantity of heat is evolved or absorbed in
4 answers
asked by
Kat
1,816 views
What is the enthalpy change if 25.0 g of methane are burned? 890kJ of heat released for every mole of methane that reacts. CH4 +
3 answers
asked by
Tracy
1,785 views
27) What volume of benzene (C6H6, d= 0.88 g/mL, molar mass = 78.11 g/mol) is required to produce 1.5 x 103 kJ of heat according
4 answers
asked by
Jennifer
1,767 views
Calculate the enthalpy change when 50. g of ice at -30.0 °C is heated to completely melt to liquid water at 0.0°C. (The heat
3 answers
asked by
Robert
1,656 views
4Al + 3O2->2Al2O3(triangle)H= -1669kj/mol
2Fe + O2 ->2FeO (triangle)H= -822 kj/mol Determine enthalpy change?
7 answers
asked by
Edna
1,469 views
According to the following reaction, how much energy is evolved during the reaction of 32.5g B2H6 and 72.5g Cl2? The molar mass
3 answers
asked by
Amanda
1,465 views
A calorimeter contains 22.0 mL of water at 14.0 C. When 2.50 g of X (a substance with a molar mass of 66.0 g/mol) is added, it
4 answers
asked by
Amanda
1,314 views
Hydrogen peroxide decomposes according to the following:
H2O2--> H2O(l) + 1/2O2(g); deltaH = -98.2kJ Calculate the change in
2 answers
asked by
Lindsey
1,247 views
ZN(s) + 2H+(aq) produces ZN2+(aq) +H2(g)
A sample of Zinc is placed in the ice calorimeter. if 0.0657g of Zinc causes a decrease
3 answers
asked by
Temmick
1,239 views
In a coffee cup calorimeter, 1.60 g of NH4NO3 is mixed with 75.0 g
water at an initial temperature of 23.50 ºC. When the salt
3 answers
asked by
Eddie
1,239 views
CH3OH CO + 2H2 H = +90.7kJ
9. For the forward reaction, is heat being absorbed or released? 10. How much heat would be
2 answers
asked by
Anonymous
1,232 views
Calculate the enthalpy change for the reaction 2C + H2 yield C2H2 given the following reactions and their respective enthalpy
3 answers
asked by
Lucy
1,190 views
24. Hydrogen peroxide can decompose to water and oxygen according to:
2H2O2 (l) + -----------> 2H2O (l) + O2 (g) ^ H = -196 kJ
2 answers
asked by
janet
1,188 views
The biochemical conversion of Glucose, C6H12O6, into pyruvic acid, C3H4O3, is an important step in the TCA (Kreb’s) cycle
1 answer
asked by
Tammy
1,130 views
Calculate the enthalpy change in the reaction of H2 with F2 to produce HF. The H–H and F–F bond energies are 436 and 155
2 answers
asked by
Erin
1,110 views
Calculate DeltaHrxn for the following reaction:
C + H2O --> CO + H2 Use the following: C + O2 --> CO2 DeltaH = -393.5 kJ 2CO + O2
2 answers
asked by
Chemistry
1,110 views
How much heat is released when a mixture containing 10.0g CS2 and 10.0 g Cl2 reacts by the equation.
CS2 + 3Cl2 ----> S2Cl2 +
4 answers
asked by
Lauren
1,087 views
estimate the enthalpy change for the following reaction:
OF2 + H2O = O2 + 2HF
2 answers
asked by
small
1,074 views
enthalpy change^H is +23kJ mol-1 of phosphine (PH3) for the reaction
2P(s)red+3H2(g)---->2PH3(g) a) Calc. entropy change for this
1 answer
asked by
harry
1,070 views
Zinc dissolves in acid according to the balanced reaction:
Zn(s) + 2H^+(aq) -> Zn^2+(aq) + H2(g) A sample of zinc is placed in
4 answers
asked by
Kjd
1,064 views
calculate the enthalpy change for: (enthalpy of formation of aqueous sodium hydroxide is -469.60 kJ/mol. enthalpy of formation
2 answers
asked by
Annie
983 views
A scientist measures the standard enthalpy change for the following reaction to be -53.4 kJ :
Ca(OH)2(aq) + 2 HCl(aq) CaCl2(s) +
2 answers
asked by
Austin
958 views
When a 28.8mL of .500M H2SO4 is added to 28.8mL of 1.00M KOH in a coffee-cup calorimeter at 23.50 degrees Celsius, the
2 answers
asked by
Kelsie
944 views
Using standard enthalpies information, calculate the standard enthalpy change for this reaction:
a) (thermite reaction) 2Al(s) +
2 answers
asked by
Brett
904 views
A 5.0g KBr sample, at 25 degrees celsius, dissolved in 25 ml of water, also at 25 degrees celsius. the final equilibrium
2 answers
asked by
jonathan
883 views
Calculate the enthalpy change of formation for the following reactions using Hess's law, and the enthalpies of formation given
2 answers
asked by
BOB
897 views
Data: C(graphite) + O2(g) forms CO2 (ga) Delta H = -393.5kJ
H2(g) + 1/2O2(g) forms H2O(l)Delta H = 285.8kJ. CH3OH(l) +
2 answers
asked by
lavonne
891 views
Calculate the enthalpy change, ΔrH, for the following reaction,
4 NH3 (g) + 5 O2(g) → 4 NO (g) + 6 H2O (g) given the
1 answer
asked by
Hannah
836 views
What is Delta H degrees for the gas-phase reaction below?
CH4+ CL3 = CH3CL+ HCL Bond dissociation energies of CL-CL, C-CL, H-CL,
2 answers
asked by
Christian
847 views
calculate the change in enthalpy when 1.00g of hydrogen peroxide decomposes. H2O2(l) yields H2O(l)+ 1/2O2(g) (traingle)H-
1 answer
asked by
crystine cole
847 views
N2 + O2 --> 2 NO change in heat (delta H)= 43.2 kcal
based on the reaction, which statement is true? a) 43.2 kcal are consumed
4 answers
asked by
Katie Y.
842 views
Pages
1
2
3
4
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