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Thermochemistry
Page 4
Questions (383)
When 7.5 g of ethane was completely burned, all the heat produced was used to heat 1.50
kg of water. If the temperature of water
1 answer
asked by
elaine
494 views
Calculate the DHrxn of
C6H12O6 (s) + O2 (g) --> CO2 (g) + H2O (l) with DHf. C6H12O6(s) -1260.04 O2(g) 0 CO2(g) -393.5 H2O(l)
4 answers
asked by
Anonymous
554 views
I don't know why it was marked wrong. This is what it said: Where is the 5.64 coming from? (thank you)
HINT To balance the
1 answer
asked by
patrick
477 views
Hey guys! I'm really lost on this equation. Any help?
H2(g) yIelds 2H(g) Delta H = 436 kJ/mol F2(g) yields 2F(g) DeltaH = 158
2 answers
asked by
Allie
620 views
When one mole of C6H6 is burned, 3.27 MJ of heat is produced. When the heat from burning 7.59 g of C6H6 is added to 5.69 kg of
3 answers
asked by
Angel
1,161 views
Find the heat of reaction (ΔH) for each of the following chemical reactions and note whether each reaction is exothermic or
2 answers
asked by
Emily
795 views
at its melting point, O c, the enthalpy of fusion of water is 1.435 kcal/mol. what is the molar entropy change for the melting
3 answers
asked by
thomas
779 views
If the ΔH for H2O(l) → H2O(s) is -6.01 kJ, then what is the ΔH for 2H2O(s) → 2H2O(l)?
A. -12.02 kJ B. 6.01 kJ C. -6.01 kJ
1 answer
asked by
Morgan
295 views
Calculate the molar enthalpy of reaction
standard enthalpy of formation below. H20 = -285.8 kj/mole H+ = 0.0 kj/mole OH- = -229.9
3 answers
asked by
sam
545 views
NH4NO3(s)+H2O(l)→NH4NO3(aq) ΔH = +25.7 kJ.
What is the final temperature in a squeezed cold pack that contains 49.0g of NH4NO3
4 answers
asked by
Bri
1,539 views
The heat of neutralization of HCl (aq) by NaOH is -55.9Kj/mol H2) produced. If 50ml of 1.6M NaOH at 25.15 celsius is added to
2 answers
asked by
Annie
1,279 views
what is heat of nuetralization
3 answers
asked by
zeynab tahir
424 views
what are the heats of fusion/vaporization & specific heats of nitroglycerin
2 answers
asked by
matt
482 views
Consider the following problem:
Target: 2NOCl(g) ? N2(g)+ O2(g)+Cl2 (g) ?Hrxn= ? Steps: 1. 1/2 N2(g) + 1/2 O2(g)? NO(g) ?H= 90.3
2 answers
asked by
David
533 views
When 1.0 L solution Ba (NO3) 2 2.0 M at 25oC is mixed with 1.0 L solution of 2.0 M Na2SO4 in a calorimeter, the reaction that
1 answer
asked by
Norsiah
512 views
What is the Molar Enthalpy of Neutralization in kJ/mol if 5.00 moles of HCl(aq) (acid) neutralized 5.00 moles of NaOH(aq) (base)
1 answer
asked by
BRANDIE
432 views
What is the balanced thermochemical equation for the combustion of propane and how much heat is released if 25 grams of propane
2 answers
asked by
Is my right correct?
3,264 views
what is the molar enthalpy of combustion for magnesium? calimetry experiment
results 100.0ml of HCl with 0.31g of Mg ribbon temp
4 answers
asked by
redeye
1,082 views
When sulfuric acid dissolves in water, a great deal of heat is given off. The enthalpy change for this process is called the
3 answers
asked anonymously
63 views
for the reaction 2C2H2(g)=>C6H6(l) at 25 C, the standard enthalpy change is -631 kJ and the standard entropy change is -430 J/K.
2 answers
asked by
concerned chem student
696 views
Calculate the standard reaction enthalpy for
the reaction NO2(g) ! NO(g) + O(g) Given: O2(g) ! 2O(g) �H� = +498.4 kJ/mol NO(g) +
2 answers
asked by
cheri
843 views
If the standard enthalpy of combustion of octane, C8H18(l) is -5471 kJ/mol, calculate the enthalpy change when 1.00 kg of octane
4 answers
asked by
Sam
1,291 views
if the heat of combustion for a specific compound is -1320.0 KJ/mol and its molar mass is 67.53 g/mol how many grams of this
3 answers
asked by
Jacob
451 views
If 3.4 mol of methane is heated so that the temperature of the gas increases 45 K while its pressure remains constant, how much
1 answer
asked by
Meg
409 views
In a constant-pressure calorimeter, 50.0 mL of 0.340 M Ba(OH)2 was added to 50.0 mL of 0.680 M HCl. The reaction caused the
3 answers
asked by
cassie
1,064 views
Consider the rxn during the Haber Process:
N2 + 3H2 ---> 2NH3 The equilibrium constant is 3.9 x 10^(5) at 300 K and 1.2 x 10^(-1)
4 answers
asked by
John
2,204 views
How much alcohol must be burned to generate 279kj of heat to warm the water as described in
problem 3?(from 60 F to 180 F) a.
3 answers
asked by
Anonymous
390 views
Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at
2 answers
asked by
Tracy
552 views
Thermochemistry
determine the final temperature if 45.67 kJ of heat energy is removed from 18.5 g of H2O (g) at 122 degrees
4 answers
asked by
Rose Bud
735 views
The standard enthalpy of formation of n-octane is -249.95 kJ/mol. Compute the amount of heat liberated when 5.24 g of n-octane
3 answers
asked by
LaurenB
957 views
given the reaction: 2mg + o2-----> 2mgo . when 4.32g of oxygen react with magnesium 327kj of energy is produced. the heat of
2 answers
asked by
ABCD
857 views
The molar enthalpy of combustion of ethanol is -1234.8kJ/mol. How much water can be heated from 10.85 degrees celsius to 72.6
3 answers
asked anonymously
55 views
Use Hess's law and the reactions
1) CH 4(g)+ Cl 2 (g)--->CH 3 CL(g) + HCl (g) 2) CH 3 Cl (g) + Cl 2 (g)---> CH 2 Cl 2 (g) + HCl
2 answers
asked by
Jessica Jones
803 views
What is the heat change in J associated with 44 g of solid methanol at -149 oC changing to liquid at -83 oC?
c(methanol) (liq) =
2 answers
asked by
TaSheanda
497 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
How much heat is contained in 4 liter of liquid methanol (CH3OH) when it is completely combusted (excess oxygen) to form carbon
1 answer
asked by
Laura
985 views
Given that delta Hrxn for OH- ions is -229.6 kJ/mol, calculate the enthalpy of neutralization when I mole of a strong monoprotic
2 answers
asked by
Alexis
1,249 views
Use the thermochemical equations shown below to determine
the enthalpy (kJ) for the reaction: H2SO3(l)=>H2S(g) + 3/2O2(g)
1 answer
asked by
sara
603 views
Determine the molar enthalpy of reaction for the reaction of the reaction of magnesium oxide with hydrochloric acid
3 answers
asked anonymously
39 views
In an experiment using a simple tin calorimeter 18.95g of methanol was burned to raise the temperature of 708g of water by 29.5
3 answers
asked anonymously
33 views
the heat of neutralization for a strong acid in dilute water solution is about 60 kJ/mol of H+. What quantity of heat in kJ is
2 answers
asked by
Sarah
1,224 views
A student mixed 50.0 mL of 0.50 M H2SO4 (aq) at 18.5 degrees C with 100 mL of 0.50 M NaOH (aq) at the same temperature. After
1 answer
asked by
Anonymous
451 views
if 1.5 of ethanol is 37 degree celcious, what is the final tempereature when you add 80000 joules
1 answer
asked by
Anonymous
345 views
Write three thermochemical equation needed to calculate delta H for the following reaction:
2Mg(s) + O2(g) = 2MgO Include delta h
1 answer
asked by
Shana
1,045 views
A 0.1589 g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter
2 answers
asked by
Tanisha
699 views
Help me! Express your answers in kJ/mol!!
Use Hess's Law to find ΔH for the following reactions: Express your answers in kJ/mol
4 answers
asked anonymously
41 views
how do i solve this thermochemical equation? and what r the steps to it
1. Find the heat of reaction for the following equation.
1 answer
asked by
dawson
500 views
What is DH°rxn for the following reaction, CH4(g) + 2 O2(g) ---> CO2(g) + 2 H2O(l), given
DH°f[CH4(g)] = -74.8 kJ;
2 answers
asked by
AnthoniiEllis
758 views
Given the thermochemical equation SO2(g) + ½ O2(g) ® SO3 (g) DH = -99.1 kJ
calculate the enthalpy change (DH) when 89.6 g of
2 answers
asked by
JennyB
1,140 views
Am I Correct in assuming this?
dH of solution = -dH of lattice enthalpy + dH of hydration E.g: dHsolution NaCl = -dHLE NaCl(s) +
3 answers
asked by
Ben
1,012 views
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Parent Categories (9)
Acids and Bases
Chemical Reactions
Chemistry
Chemistry Knowledge
Physical Chemistry
Physics
Reactions and Energy
Stoichiometry
Thermodynamics