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Pavlova-9 [17]
2 years ago
10

A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 8.10kg of water at 33.9 degree

s celsius . During the reaction 69.0kJ of heat flows out of the bath and into the flask.
Required:
Calculate the new temperature of the water bath. You can assume the specific heat capacity of water under these conditions is 4.18J*g*K. Round your answer to 3 significant digits.
Chemistry
1 answer:
Lena [83]2 years ago
5 0

Answer:

T_F=31.9^0C

Explanation:

Hello,

In this case, the energy content is modeled via:

Q=mCp(T_F-T_0)

Since the unknown is the final temperature, it is solved by:

T_F=T_0+\frac{Q}{mCp} =33.9^0C+\frac{-69.0kJ}{8.10kg*4.18\frac{kJ}{kg*^0C}} \\T_F=31.9^0C

The heat is negative since it flows out of the bath that is the considered system.

Best regards.

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Answer:

The number of copper atoms 12.405 ×10²³ atoms.  

The number of silver atoms  13.13 ×10²³ atoms.

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Explanation:

Given data:

In beaker A

Number of moles of copper = 2.06 mol

Number of atoms of copper = ?

In beaker B

Mass of silver = 222 g

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Solution:

For beaker A.

we will solve this problem by using Avogadro number.

The number 6.022×10²³ is called Avogadro number and it is the number of atoms in one mole of substance.

While we have to find the copper atoms in 2.06 moles.

So,

63.546 g = 1 mole = 6.022×10²³ atoms

For 2.06 moles.

2.06 × 6.022×10²³ atoms

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For beaker B:

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For 222 g

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A calorimeter contains 251 g of water at 24.3 C.The temperature of the water decreases to 18.5 C when 12.5 g of potassium nitrat
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Answer:

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Explanation:

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