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Exam 3: Matter and Energy

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Question 1

Multiple Choice

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In which of the following would the particles move most rapidly?

A) ice at -20 °C
B) boiling water
C) ice at 0 °C
D) steam at 110 °C
E) water at 20 °C

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Question 2

Multiple Choice

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A taco from a fast food restaurant contains 7.0 g of fat, 25. g of carbohydrate, and 11 g of protein. How many kJ of energy does the cheeseburger contain? (The caloric values for foods are 38 kJ/g for fat, 17 kJ/g for Carbohydrate, and 17 kJ/g for protein.) Round off the answer for each food type to the tens place.

A) 210 kJ
B) 890 kJ
C) 43 kJ
D) 70 kJ
E) 1100 kJ

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Question 3

Multiple Choice

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A 2.5 g sample of french fries is placed in a calorimeter with 500.0 g of water at an initial temperature of 21 °C. After combustion of the french fries, the water has a temperature of 48 °C. What is the caloric value (kcal/g) of the french fries?

The specific heat of copper is 0.0920 cal/g °C, and the specific heat of silver is 0.0562 cal/g °C. If 100 cal of heat is added to one g of each metal at 25 °C, what is the expected result?

A diet has a total caloric intake of 1400 kcal. If the protein in the diet provides 35% of the kcal, the number of kcal of protein in the diet is

A slice of pizza contains 29 g of carbohydrate, 13 g of protein and an unknown amount of fat. If the pizza contains 280 kcal, how many grams of fat are present? (The caloric values for foods are 4.0 kcal/g for Carbohydrate, 4.0 kcal/g for protein, and 9.0 kcal/g for fat.) Round off the answer for each food type to the tens Place.

3.25 kcal is the same amount of energy as

Which one of the following properties describes a liquid?

The boiling point of water on the Celsius scale is ________ °C.

Which of the following is a property of a solid?

A gold ingot is a(n)

The energy of motion is called ________ energy.

100. J is the same amount of energy as ________ kcal.

Bromine (Br₂) has a freezing point of -7 °C, and a boiling point of 60 °C. Indicate the state or change of state occurring at each temperature. - 30 °C

One cup of kidney beans contains 15 g of protein, 1.0 g of fat, and 42 g of carbohydrate. How many kilocalories does this contain? (The caloric values for foods are 4.0 kcal/g for protein, 9.0 kcal/g for fat, and 4.0 kcal/g for Carbohydrate.) Round off the answer for each food type to the tens place.

How many calories are required to increase the temperature of 13 g of ethanol from 11 °C to 23 °C? The specific heat of alcohol is 0.588 cal/g °C.

Bromine (Br₂) has a freezing point of -7 °C, and a boiling point of 60 °C. Indicate the state or change of state occurring at each temperature. -60 °C

The dietary calorie (Cal) is equal to

Which of the following does NOT represent a step on the heating curve of water?

650. J is the same amount of energy as