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Thermochemistry KC #2 2024

Authored by Justin Simpson

Chemistry

9th - 12th Grade

Used 1+ times

Thermochemistry KC #2 2024
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7 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Calculate A 50g sample is heated with 500 joules of energy and has a 10*C temperature change. Calculate it’s specific heat.

1 j/g*C

250000 j/g*C

500 j/g*C

10 j/g*C

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

4180 j of heat energy are added to change the temperature of water by 10*C. How many grams of water are being heated? cwater=4.18 j/g*C

4.18 j/g*C

10000g

174724g

100g

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

What does q stand for?

Heat-Joules

Mass-Grams

Specific Heat-J/g*C

Temperature Change-*C

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

A 24.0 gram sample of copper was heated from 25.0oC to 500.0oC, 4378 J of heat were absorbed, what is the specific heat of copper?

0.384 J/g°C

49909200 J/g°C

2.60 J/g°C

8.77 J/g°C

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

The specific heat of platinum is 0.133 J/g°C. How much heat is released when a 10 g piece of platinum cools from 100°C to 50°C?

66.5 J

665 J

0.0266 J

0.665 J

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

A sample of iron receives 50 J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample?

25g

30g

20g

50g

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the specific heat of an unknown substance if 100.0 g of it at 200.0 °C reaches an equilibrium temperature of 27.1 °C when it comes in contact with a calorimeter of water.  The water weighs 75. g and had an initial temperature of 20.00 °C?  (Specific heat of water is 4.18 J/g°C) (show your work)

0.111 J/g°C
1.29 J/g°C
0.129 J/g°C
22225.85 J

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