Calorimetry Form 2

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Calorimetry Form 2

Please use a blank sheet of paper to work out the math problems.

You have three graded responses for this form.

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1. Given the balanced equation representing a reaction: *

A) The reaction is endothermic because it releases heat.

B) The reaction is endothermic because it absorbs heat.

C) The reaction is exothermic because it releases heat.

D) The reaction is exothermic because it absorbs heat.

2. Which quantity of heat is equal to 200. joules? *

A) 0.200 kJ

B) 20.0 kJ

C) 0.0200 kJ

D) 2.00 kJ

3. What is the total amount of heat absorbed by 100.0 grams of water when the temperature of the water is increased from 30.0 °C to 45.0 °C? [Specific Heat of Water = 4.18 J/g °C ] *

A) 12,500 J

B) 6,270 J

C) 18,800 J

D) 418 J

4. A 36-gram sample of water has an initial temperature of 22°C. After the sample releases 1,200 joules of heat energy, what is the final temperature of the sample?

[Specific Heat of Water = 4.18 J/g °C ]

A) 14°C

B) 55°C

C) 30.°C

D) 8.0°C

5. The temperature of a sample of water changes from 10°C to 20°C when the sample absorbs 418 joules of heat. What is the mass of the sample? [Specific Heat of Water = 4.18 J/g °C ] *

A) 1 g

B) 1,000 g

C) 10 g

D) 100 g

6. A 50.0-gram block of copper at 10.0°C is carefully lowered into 100.0 grams of water at 90.0°C in an insulated container. Which of the following statements describes the transfer of heat in this system? *

A) The water loses heat to the block until both are at 10.0°C.

B) The block gains heat from the water until both are at 90.0°C

C) The water gains heat and the block loses heat until both are at the same temperature that is between 10.0°C and 90.0°C.

D) The water loses heat and the block gains heat until both are at the same temperature that is between 10.0°C and 90.0°C.

7. What occurs when a 35-gram aluminum cube at 100.°C is placed in 90. grams of water at 25°C in an insulated cup? *

A) Heat is transferred from the aluminum to the water, and the temperature of the water decreases.

B) Heat is transferred from the aluminum to the water, and the temperature of the water increases.

C) Heat is transferred from the water to the aluminum, and the temperature of the water decreases.

D) Heat is transferred from the water to the aluminum, and the temperature of the water increases.

8. Which type of energy is associated with the random motion of the particles in a sample of gas? *

A) nuclear energy

B) chemical energy

C) electromagnetic energy

D) thermal energy

9. What occurs when the temperature of 10.0 grams of water is changed from 15.5°C to 14.5°C? [Specific Heat of Water = 4.18 J/g °C ] *

A) The water releases 41.8 joules.

B) The water releases 155 joules.

C) The water absorbs 41.8 joules.

D) The water absorbs 155 joules.

10. A solid is dissolved in a beaker of water. Which observation suggests that the process is endothermic? *

A) The solution changes color.

B) The temperature of the solution decreases.

C) The solution gives off a gas.

D) The temperature of the solution increases.

12. Which of the following statements is true concerning the reaction N(g) + N(g) --> N2(g) + energy? *

A) A bond is broken and energy is released.

B) A bond is broken and energy is absorbed.

C) A bond is formed and energy is absorbed.

D) A bond is formed and energy is released.

13. Which change of phase is exothermic? *

A) NaCl(s) --> NaCl(l)

B) CO2(s) --> CO2(g)

C) H2O(l) --> H2O(s)

D) H2O(l) --> H2O(g)

14. A student performed an experiment to determine the total amount of energy stored in a peanut.

The student measured 100.0 grams of water into a metal can and placed the can on a ring stand, as shown in the diagram below. The peanut was weighed as .50 grams and attached to a wire suspended under the can. The initial temperature of the water was recorded as 22.0°C. The peanut was ignited and allowed to burn.

When the peanut finished burning, the final water temperature was recorded as 57.0°C.

Calculate the total amount of heat absorbed by the water in the given experiment in Joules.

Just add the correct number Rounded to the correct Sig Figs and a space and the word Joule. Example: 2300 Joule

15. A student performed an experiment to determine the total amount of energy stored in a peanut.

When the peanut finished burning, the final water temperature was recorded as 57.0°C.

Calculate the total amount of heat released by the peanut in the given experiment in Joules.

Just add the correct number Rounded to the correct Sig Figs and a space and the word Joule. Example: 2300 Joule

16. Given the following substances with their respective specific heat capacity values, choose the correct order of materials that have a decreasing ability to conduct heat. *

Liquid water, Water Vapor, Granite, Lead

Iron, Dry Air, Ice, Liquid water

Granite, Iron, Water vapor, Dry Air

Dry Air, Water Vapor, Solid water, Copper

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