Question

1. A piece of glass has a mass of 89 grams, an initial temperature of 335 ºC and a specific heat of 0.9 J/g/C. It is dipped in a water container with 225 grams of water at 19 ºC. The water has a specific heat of 4.2 J/g/C.

What will be the final temperature in Celsius of the water and the glass after a long time?

Answer #1

7. Calorimetry A piece of metal has mass 100 grams and an
initial temperature of 100'C. lt is placed in an insulated
container of mass 200 grams which contains 500 grams of water at an
initial temperature of 17 .3"C. The container is made of the same
material as the metal sample. lf the final temperature is 22.7'C,
what is the specific heat capacity of this metal? How many calories
('1 cal = 4.186 J) are required to warm the...

If a piece of Cd with a mass = 37.6 g and initial temperature of
100.0 o C is dropped in 25.0 mL
of water at 23 o C, what is the final temperature of the system?
specific heat of Cd = 0.232
J/g o C; specific heat of water = 4.184 J/g o C.

A small piece of ice (mass = 0.10 kg) at an initial temperature
of 0oC is placed within glass of water, where the
water's mass is 0.40 kg and it is at an initial temperature of
30oC.
(a) What is the final temperature of the system when thermal
equilibrium is achieved assuming no heat leaks?
(b) What is the entropy change of just the ice only while it
melts?
The latent heat of fusion and specific heats of ice and...

Data
Balance temperature: 27ºC
Initial water temperature: 23ºC
Initial temperature of the metal part: 68ºC
Mass of the metal part: 193 grams
Mass of the empty calorimeter: 110 grams
Mass of the water inside the calorimeter: 250 grams
Specific heat of water: 4.19 J / gºC
Specific heat of the calorimeter (aluminum): 0.90 J / gºC
Experiment calculations
1- Calculate the heat gained by the water
2- Calculate the heat gained by the calorimeter
3- Calculate the specific heat of...

A 72.5 gram piece of magnesium is heated to a temperature of
98.90ºC. The metal is then dropped into 40.0 grams of water at a
temperature of 18.50ºC inside a perfect calorimeter. Calculate the
final temperature of the water in the calorimeter. The specific
heat capacity for magnesium is Cp = 1.020 J/g·ºC.
Tfinal = ºC

Hot tea (water) of mass 0.21 kg and temperature 62 ∘C is
contained in a glass of mass 200 g that is initially at the same
temperature. You cool the tea by dropping in ice cubes out of the
freezer that are at a temperature of – 11 ∘C. What is the minimum
amount of ice in you need to make ice tea (final temperature of
0∘C)? Give your answer in kg to two decimal places. The specific
heat of...

An object with a specific heat of 0.800 J/gºC at a temperature
of 405 ºC is placed in a calorimeter with a heat capacity of 2.00
J/ºC that contains 100.0 mL of water. The initial temperature of
the water and the calorimeter is 25.3ºC. After the object is added
to the calorimeter, the final temperature of the calorimeter,
water, and object is 29.8ºC. What is the mass of the object in
grams?

2. Sixty grams of water is at an initial temperature of 24
°C.
Calculate the heat required to completely convert the 100 ºC
water to steam. (The latent heat of vaporization of water is 540
cal/g.)
The heat required to completely convert the 100 ºC water to
steam is... kcal?
3. How much heat is required to raise the temperature of 140 g
of water from 12°C to 88°C? The specific heat capacity of water is
1 cal/g·°C.
The heat...

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 25.0g piece of aluminum (molar heat capacity of 24.03 J/g
degrees Celsius) is heated to 82.4 degrees Celsius and dropped into
a calorimeter containing water (specific heat capacity of water is
4.18 J/g degrees Celsius) initially at 22.3 degrees Celsius. The
final temperature of the water is 24.98 degrees Celsius. Calculate
the mass of water in the calorimeter.

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