Question

A 1.00 g sample of octane (C8H18) is burned in a calorimeter that contains 1.20 kg of water. The temperature of the water and the bomb rises from 25.00°C to 33.20°C. The heat capacity of the bomb, Cbomb, is 837 J/0C . Specific heat for water: 4.184 Jg–1°C–1.

a) Calculate the amount of heat gained by the calorimeter

b) Calculate the amount of heat gained by the water

c) Calculate the amount of heat given off per mol of octane (in kJ/mol)

Answer #1

A 1.000 g sample of octane (C8H18) is burned in a bomb
calorimeter containing 1200 grams of water at an initial
temperature of 25.00ºC. After the reaction, the final temperature
of the water is 33.20ºC. The heat capacity of the calorimeter (also
known as the “calorimeter constant”) is 837 J/ºC. The specific heat
of water is 4.184 J/g ºC. Calculate the heat of combustion of
octane in kJ/mol.

A 1.00g sample of octane (C8H18) is burned in a calorimeter that
contains 1.20kg of water. The temperature of the water and the bomb
rises from 25.00oC to 33.20oC. If the heat capacity of the bomb,
Cbomb, is 837J/K calculate the heat given off per mole of octane.
Specific heat for water: 4.184 J/g.°C
Please show work, correct equation to use and values. I know how
to calculate heat but not sure how to correctly find heat per
mole.
86...

Calculate heat of combustion reaction of 1.0 g of octane:
2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O
The calorimeter contains 1200 g water, and the temperature
changes from 25.00 deg C to 33.20 deg C. Heat capacity of bomb is
837 J/deg C.

A 0.553-g sample of diphenyl
phthalate
(C20H14O4) is
burned in a bomb calorimeter and the temperature increases from
24.40 °C to 27.57 °C. The
calorimeter contains 1.08×103 g of
water and the bomb has a heat capacity of 877
J/°C. The heat capacity of water is 4.184 J
g-1°C-1. Based on this experiment, calculate
ΔE for the combustion reaction per mole of diphenyl
phthalate burned.
______ kJ/mol

A 0.373-g sample of naphthalene (C10H8) is burned in a bomb
calorimeter and the temperature increases from 24.90 °C to 27.80
°C. The calorimeter contains 1.05E3 g of water and the bomb has a
heat capacity of 836 J/°C. Based on this experiment, calculate ΔE
for the combustion reaction per mole of naphthalene burned
(kJ/mol).

A 0.287-g sample of bianthracene (C28H18) is burned in a bomb
calorimeter and the temperature increases from 25.30 °C to 27.50
°C. The calorimeter contains 1.03E3 g of water and the bomb has a
heat capacity of 856 J/°C. Based on this experiment, calculate ΔE
for the combustion reaction per mole of bianthracene burned
(kJ/mol).

Using the following thermal chemical data (use Hess’s law)
2Fe(s) + 6HF(g) —> 2FeF3(s) + 3H2(g)
?rH•= -1787.4 kJ/mol
2Fe(s) + 6HCl(g) —> 2FeCl3(s) + 3H2(g)
?rH•= -1457.0 kJ/mol
calculate?rH• for the following reaction:
FeCl3(s) + 3HF(g) —> FeF3(s) + 3HCl(g)
2. when 19.86g NaOH is dissolved in 125 mL of water in the
coffee-cup calorimeter, the temperature rises from 23•C to 65•C.
what is the enthalpy change per mole of the hydroxide dissolved in
the water? Assume that...

When 86.6 g of a compound was burned in a bomb calorimeter that
contained 0.184 kg of water the temperature rise of the water in
the calorimeter was 57.0C. If the heat of combustion of the
compound is 1,396 kJ/mol, what is the molar mass of the compound?
Specific heat of water is 4.184 J/gC. Answer to 0 decimal places
and enter the units.

. A 0.500 g sample of naphthalene (C10H8) is burned in a bomb
calorimeter containing 650 grams of water at an initial temperature
of 20.00 oC. After the reaction, the final temperature of the water
is 26.4ºC. The heat capacity of the calorimeter is 420 J/oC. Using
these data, calculate the heat of combustion of naphthalene in
kJ/mol.

1.
A bomb calorimeter, or a constant
volume calorimeter, is a device often used to determine the heat of
combustion of fuels and the energy content of foods.
In an experiment, a 0.4137 g sample of
bianthracene
(C28H18) is burned
completely in a bomb calorimeter. The calorimeter is surrounded by
1.361×103 g of water. During the
combustion the temperature increases from 24.82 to
27.25 °C. The heat capacity of water is 4.184 J
g-1°C-1.
The heat capacity of the calorimeter...

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