Question

The specific heat capacity of aluminium is C aluminium= 900 J/kgC, and that of iron is C iron=450J/kgC. Samples of pure aluminium with mass M aluminium =50 kg and iron with mass M iron= 100 kg are prepared, along with a number of fancy boxes through wich heat does not flow. At an initial time, both the aluminium and iron samples are at T initial= 20C.

e)Determine the effective specific heat capacity of the combined samples.

f)ONe half of the aluminium and one half of he iron is removed from the box and deposited into anotehr box. That is, one half of the homogeneous mixture is transferred to a new box. A quantity of heat, 270,000 J, is added to the new box. Determine the temperature of the aluminium-iron mixture in the box, once it has absorbed all of the input heat.

g) An amount of heat, 180,000 J, is removed from the aluminium-iron mixture remaining in the original box in (f). Determine the temperature of the aluminium-iron mixture in the box, once it has released all of the output heat.

h)The two halves of the sample from (f) and (g) are recombined. Determine the final equilibrium temperature of the restored mixture.

Answer #1

A 78 kg block of Iron (Specific Heat Capacity 348 J/kg.K) at
temperature T kelvin is inserted into 5 kg of water (Specific Heat
Capacity 4005 J/kg.K and initial temperature is 300 K). Final
temperature of the mixture is 308 K. Assuming no heat loss to
surrounding calculate the initial temperature of the iron block:
_______ K

one piece of iron, specific heat capacity of 0.450 J/g•˚C, has a
temperature of 129˚C. Another piece of iron has a mass exactly
double the mass of the first piece, and its temperature is 45˚C.
Both pieces are put inside a calorimeter that has negligible heat
capacity. Calculate the final temperature of the calorimeter and
its contents.

A 6.40 g sample of iron (specific heat capacity = 0.451 J/g*C)
is placed in a boiling water bath until the temperature of the
metal is 100.0*C. The metal is quickly transferred to 119.0g of
water at 25.0*C in a calorimeter (specific heat capacity of water =
4.18 J/g*C). Determine the final temperature of the water in the
calorimeter (3 significant figures).

Answer the following questions:
a) A calorimeter, specific heat capacity 500.0 J/kgC, mass 200.0
g, contains 300.0 g of water at 40.0 C. If 50.0 g of ice at 0.00 C
is dropped into the water and stirred, the temperature of the
mixture when the ice has melted is 23.8 C. Calculate the heat of
fusion of ice.
b) What is the final temperature attained when 900.0 g of ice at
0.00 C is dropped into 3400.0 g of water...

A 6.40 g sample of iron (specific heat capacity =0.451 J/g*C) is
placed in a boiling water bath until the temperature of the metal
is 100.0*C. The metal is quickly transferred to 119.0g of water at
25.0*C in a calorimeter (specific heat capacity of water = 4.18
J/g*C). Determine the final temperature of the water in the
calorimeter (3 significant figures).

The following table lists the specific heat capacities of select
substances: Substance Specific heat capacity [J/(g⋅∘C)] silver
0.235, copper 0.385, iron 0.449, aluminum 0.903, ethanol 2.42,
water 4.184, Water (2430 g ), is heated until it just begins to
boil.
If the water absorbs 5.07×105 J of heat in the process, what was
the initial temperature of the water? Express your answer with the
appropriate units.

In a calorimetry experiment to determine the specific heat
capacity of a metal block, the following data was recorded:
Quantity
Mass of the metal block
0.50 kg
Mass of empty calorimeter + Stirrer
0.06 kg
Mass of calorimeter + stirrer + water
0.20 kg
Mass of water
0.14 kg
Initial Temperature of metal block
55.5 ⁰C
Initial Temperature of water and calorimeter
22 ⁰C
Final Temperature of block- water system
27.4 ⁰C
Take the specific heat capacity of water to...

Q 4. A metal block of heat capacity 600 J K-1
loses 1 M.J of heat energy to its surroundings. Find the decrease
in temperature.
Q5. One mega joule of heat energy is supplied to a piece
of iron and raises its temperature from
20?C to
200?C. Find the mass of the piece
of iron.( Specific heat capacity of iron
=451Jkg-1K-1
Q6. 30grams of water at
100?C are added to 100 grams of
water at 20?C. If there is no...

8.33 kg of steam at temperature of 150 ∘C has 2.23×107 J of heat
removed from it. Determine the final temperature and phase of the
result once the heat has been removed if the heat is removed at
constant pressure during the gas phase.
For this problem, use the specific heat (at constant pressure)
for water as 1850 J/kg∘C , the latent heat of vaporization as
2.256×106 J/kg , the specific heat of liquid water as 4186 J/kg∘C ,
the...

8.33 kg of steam at temperature of 150 ∘C has 2.23×107 J of heat
removed from it. Determine the final temperature and phase of the
result once the heat has been removed if the heat is removed at
constant pressure during the gas phase. For this problem, use the
specific heat (at constant pressure) for water as 1850 J/kg∘C , the
latent heat of vaporization as 2.256×106 J/kg , the specific heat
of liquid water as 4186 J/kg∘C , the...

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