Question

A)In the laboratory a student uses a "coffee cup" calorimeter to
determine the specific heat of a metal.

She heats **19.3** grams of **chromium**
to **98.47**°C and then drops it into a cup containing
**81.8** grams of water at **23.17**°C.
She measures the final temperature to be
**24.97**°C.

Assuming that all of the heat is transferred to the water, she
calculates the specific heat of **chromium** to be
__________________ J/g°C.

B) An electric range burner weighing **616.0**
grams is turned off after reaching a temperature of
**490.2**°C, and is allowed to cool down to
**23.1**°C.

Calculate the specific heat of the burner if all the heat evolved
from the burner is used to heat **552.0** grams of
water from **23.1**°C to**80.9**°C.

**Answer** _________________J/g°C

Answer #1

For PArt A and B use the following expression: Q1 = Q2 ---> Q = m*cp*(Tf-Ti)

Now in part A, with the specific heat of water (4.184 J/g°C) and
the data, let's calculate the heat:

Q = 81.8 * 4.184 * (23.17-24.97) = -616.05 J

Now, to calculate cp = Q/m(Tf-Ti)

cp = -616.05 / 19.3 (24.97-98.4)

cp = 0.4347 J/g°C

For part B, you'll have to do exactly the same but changing values. With the data of water calculate the heat, and then solve for cp and you should get the final result. I will leave this part to you for better understanding.

Hope this helps

In the laboratory a student uses a "coffee cup" calorimeter to
determine the specific heat of a metal.
She heats 19.5 grams of tungsten
to 97.80°C and then drops it into a cup containing
78.3 grams of water at 22.58°C.
She measures the final temperature to be
23.20°C.
Assuming that all of the heat is transferred to the water, she
calculates the specific heat of tungsten to
be J/g°C.

In the laboratory a "coffee cup" calorimeter, or constant
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reaction.
A student heats 60.93 grams of gold to 98.87 °C and then drops it
into a cup containing 79.68 grams of water at 24.46 °C. She
measures the final temperature to be 26.11 °C.
The heat capacity of the calorimeter (sometimes referred to as the
calorimeter constant) was...

In the laboratory a "coffee cup" calorimeter, or constant
pressure calorimeter, is frequently used to determine the specific
heat of a solid, or to measure the energy of a solution phase
reaction. Since the cup itself can absorb energy, a separate
experiment is needed to determine the heat capacity of the
calorimeter. This is known as calibrating the calorimeter and the
value determined is called the calorimeter constant. One way to do
this is to use a common metal of...

two parts for one question
-----------------------------------------
In the laboratory a "coffee cup" calorimeter, or constant
pressure calorimeter, is frequently used to determine the specific
heat of a solid, or to measure the energy of a solution phase
reaction. Since the cup itself can absorb energy, a separate
experiment is needed to determine the heat capacity of the
calorimeter. This is known as calibrating the calorimeter and the
value determined is called the calorimeter constant. One way to do
this is...

In the laboratory a "coffee cup" calorimeter, or constant
pressure calorimeter, is frequently used to determine the specific
heat of a solid, or to measure the energy of a solution phase
reaction. A chunk of zinc weighing 18.01 grams and originally at
98.77 °C is dropped into an insulated cup containing 83.17 grams of
water at 20.02 °C. The heat capacity of the calorimeter (sometimes
referred to as the calorimeter constant) was determined in a
separate experiment to be 1.56...

In the laboratory a
"coffee cup" calorimeter, or constant
pressure calorimeter, is frequently used to determine the specific
heat capacity of a solid, or to measure the enthalpy of a solution
phase reaction.
Since the cup itself can absorb energy, a separate experiment is
needed to determine the heat capacity of the calorimeter. This is
known as calibrating the calorimeter and
the value determined is called the calorimeter
constant.
One way to do this is to use a common metal...

An electric range burner weighing 646.0 grams
is turned off after reaching a temperature of
466.2°C, and is allowed to cool down to
23.9°C.
Calculate the specific heat of the burner if all the heat evolved
from the burner is used to heat 566.0 grams of
water from 23.9°C to 82.5°C.
Answer: ________ J/g°C

A student wishes to determine the heat capacity of a coffee-cup
calorimeter. After she mixes 95.8 g of water at 62°C with 95.8 g of
water, already in the calorimeter, at 18.2°C, the final temperature
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calorimeter in J/K. Use 4.184 J/g°C as the specific heat of
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A student determines the heat of dissolution of solid
ammonium bromide using a coffee-cup calorimeter of
negligible heat capacity.
When 6.34 g of
NH4Br(s) is dissolved in
119.00 g of water, the temperature of the solution
drops from 25.00 to 22.76 °C.
Based on the student's observation, calculate the enthalpy of
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Assume the specific heat of the solution is 4.184 J/g°C.
ΔHdissolution = kJ/mol

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