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Enthalpy Change
Page 4
Questions (197)
Hydrogen H2, is used asa rocker fuel. The hydrogen is burned in oxygen to produce water vapor.
2H2 + O2 ----> 2H2O Delta H= -484
2 answers
asked by
Lauren
824 views
Part A
Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol)
2 answers
asked by
tina
827 views
In a coffee-cup calorimeter, 1.70 g of NH4NO3 is mixed with 76.0 g of water at an initial temperature of 25.00°C. After
2 answers
asked by
Brittney
811 views
Calculate ∆H0
for the reaction 2 N2(g) + 5 O2(g) −→ 2 N2O5(g) given the data H2(g) + 1 2 O2(g) −→ H2O(ℓ) ∆H0 f =
2 answers
asked by
jane
786 views
In the equation Q = mc(deltaT), I learned that Q means heat transfer. Is it the heat transfer from the system to the
3 answers
asked by
a Canadian
809 views
Hydrogen H2 is used as a rocker fuel. The hydrogen is burned in oxygen to produce water vapor.
2H2 + O2 ----> 2H2O Delta H = -484
2 answers
asked by
Lauren
800 views
When NH3 is treated with oxygen gas, the products obtained are N2(g) and H2O(l). If standard enthalpies of formation at 298 K
2 answers
asked by
shana
754 views
In a coffee cup calorimeter 70.0 mL of 0.100 M AgNO3 and 70.0 mL of 0.100 M HCl are mixed to yield the following reaction.
Ag+(aq
2 answers
asked by
Sarah
750 views
This isn't exactly a homework question, I'm just trying to understand the concept we learned today...
So say we had: 4Fe + 3O2
9 answers
asked by
A Canadian
750 views
When 22.3 mL of 1.00 M AgNO3 is mixed with 21.7 mL of 1.50 M NaCl, the temperature of the mixture rises for 21.6 degrees C to
4 answers
asked by
Sarah
715 views
When a chemist burns ammonia according to the reaction below she finds that the reaction releases heat. (It is exothermic.)
4NH3(
2 answers
asked by
Devin
706 views
Use the given data and calculate the enthalpy change for the following:
a) B2O3(s)+3COCL2(g)--->2BCL3(g)+3CO2(g) b)Hg(l)
2 answers
asked by
Amber
683 views
Back with another question similar to the one I asked before, but this one's a bit more confusing
4NH3 (g) + 5O2(g) → 4NO(g) +
2 answers
asked by
Autumn
626 views
when potassium in water are combined they produced 4000.0 kJ of heat along with potassium hydroxide and hydrogen gas. how much
1 answer
asked by
Al
635 views
the process of respiration, glucose is oxidized completely. In fermentation, O2 is absent, and glucose is broken down into Co2
1 answer
asked by
Judith
627 views
What is the enthalpy change when 17.0 g of water is cooled from 36.0°C to 6.40°C?
3 answers
asked by
Megan
611 views
Exactly .203g of zinc metal is dissolved in dilute HCl(aq) in an ice calorimeter. The heat released melts enough ice to produce
3 answers
asked by
xx
566 views
An excess of aluminum metal is added to 200.0 mL of 0.025 M solution of CuCl2, reducing the Cu+2 ions to metallic Cu. If the
3 answers
asked by
chem
552 views
The reaction between potassium metal and chlorine gas is described by the following thermochemical equation K(s) + ½C_l2(g) =
2 answers
asked by
trigger
566 views
A calorimeter contains 30.0 mL of water at 15.0 C. When 1.50 g of X (a substance with a molar mas of 46.0g/ mol is added, it
3 answers
asked by
Student
560 views
When 0.945 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 387C is observed.
Assume the solution's
3 answers
asked by
eli
557 views
When 100 mL of Ba(NO3)2 solution at 25 degrees Celsius is mixed with 100 mL solution CaSO4 solution at 25 degrees Celsius in
2 answers
asked by
Megan
549 views
Zinc dissolves in acid according to the balanced equation.
Zn(s)+ 2H(aq)-> Zn(aq) + H2(g) a sample of zinc is placed in a ice
2 answers
asked by
tomi
540 views
Calculate the enthalpy change, ΔrH, for the following reaction,
4 NH3 (g) + 5 O2(g) → 4 NO (g) + 6 H2O (g) given the
2 answers
asked by
Ninaya
548 views
If 0.812g of calcium reacts in a coffee-cup calorimeter that contains 400.0g of water/ The initial temperature of the water is
2 answers
asked by
Gem
526 views
The molar enthalpies of combustion of CH3COCOOH(l)CH3COOH(l) and CO(g) are respectively -1275kJ/mol, -875kJ/mol, and -283kJ/mol.
2 answers
asked by
Bobby
533 views
The molar enthalpies of combustion of CH3COCOOH(l)CH3COOH(l) and CO(g) are respectively -1275kJ/mol, -875kJ/mol, and -283kJ/mol.
5 answers
asked by
Bob
508 views
Calculate the value of the standard enthalpy change for each of the following reactions (standard enthalpy for Na2SO4(s) is
2 answers
asked by
Dan
524 views
Mg + 2HCI --> MgCl2 + H2
0.158 g of Mg metal is combined with an excess of HCl to make 100.0 ml of solution in a coffee up
1 answer
asked by
Eli
511 views
You mix 45 ml of .20M HCl with 45 ml of .20M KOH in a calorimeter. The temperature of both reactions before mixing is 21.5oC.
2 answers
asked by
Jessica
505 views
Calculate the enthalpy change, ÄH DeltaH, for the process in which 12.7g g of water is converted from liquid at 7.3 ∘ C \,
2 answers
asked by
ntombiningi
496 views
Someone said, "Calculate the total delta H of the reaction and subtract the total delta H of the product from it. If you get a
2 answers
asked by
A Canadian
498 views
I am having a horrible time with Enthalpy change. I understand how to find specific heat I believe, but the heat capacity of the
3 answers
asked by
Casey
499 views
The melting of 0.140 g of Br2 (which occurs at -7.2 C at 1 atm pressure) absorbs 9.43 J of heat. Compute the enthalpy change in
2 answers
asked by
rafay
472 views
What is the enthalpy change when 25 g's of PCl5 are decomposed /\ H= 90
2 answers
asked by
Anonymous
462 views
2. If the accepted enthalpy change value for the dissolving of sodium hydroxide in water is −44.2 kilojoules per mole,
3 answers
asked by
yuppp
482 views
Find the value of delta H net for the following equation:
SnBr2(s) + TiCl4(l) -> TiBr2(s) + SnCl4(l) Use the following reactions
1 answer
asked by
Hannah
479 views
with a platinum catalyst, ammonia will burn in oxygen to gove nitric oxide NO. What is the enthalpy change for the following
1 answer
asked by
Lauren
485 views
Find the value of delta H net for the following equation:
SnBr2(s) + TiCl4(l) -> TiBr2(s) + SnCl4(l) I know that I already posted
3 answers
asked by
Hannah
470 views
What is the enthalpy change when 19.0 g of water is cooled from 33.0°C to 2.70°C?
4 answers
asked by
Ashley
457 views
When 0.969 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 397C is observed.
Assume the solution's
1 answer
asked by
Anonymous
464 views
The mass of methanol that burns to produce an enthalpy change of -9.00x104 KJ
1 answer
asked anonymously
13 views
Assuming that the value of aqueous glucose at standard heat of formation is the same as solid glucose what would the enthalpy
1 answer
asked anonymously
24 views
Determine the value of the enthalpy change, AH an, for the following reaction using the information below.
AP Chemistr 4 Al ( * 3
1 answer
asked anonymously
10 views
Given the chemical reaction:
[HCl(g) + NH_3(g) \rightleftharpoons NH_4Cl(s) \quad \Delta H = -42 , \text{kcal/mol}] We want to
1 answer
asked anonymously
20 views
The question asks about the energy released during the reaction of 52.0 g of ethylene. To find the energy released, we’ll need
1 answer
asked anonymously
25 views
Calculate the change in heat for the reaction 2C + H2 > C2H2 given the following chemical equations and their respective
1 answer
asked anonymously
20 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