Module 2 - Practice Problems
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| 2.1 Convert 15.0 °C into Fahrenheit. | 59 °F
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| 2.2 The temperature of deep space is 3.5 K. What is that in Celcius? In Fahrenheit? | -269.5 °C -453.1 °F
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| 2.3 Some parts of the western United States regularly reach temperatures of 115 °F in the summer. What is that in °C? | 46 °C
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| 2.4 The average person uses 2,500.0 Cal of energy per day. How many Joules is that? Remember that a food calorie (Cal) is 1,000 chemistry calories (cal). | 1.046 x 10⁷
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| 2.5 How many Joules does it take to heat up 15.1 kg of glass from 15 °C to 45 °C? (refer to Table 2.1) | 379,251.6 J
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| 2.6 124.1 g of an unknown substance absorbs 50.0 kJ of heat and increases its temperature by 36.3 °C. What is its specific heat? | 11.1 J/g∙°C
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| 2.7 A 245 g piece of copper at room temperature (25 °C) loses 456.7 Joules of heat. What will its new temperature be? | -4.8 °C
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| 2.8 Review question #7 mentioned that drinking ice-cold water is a way of burning excess Calories. Calculate how many Calories are burned when a 12-ounce (3.40 x 10²g) glass of water at 0.0 °C is warmed up to body temperature (37.0 °C). | 12.58 Cal
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| 2.9 A calorimeter is filled with 150.0 g of water at 24.1 °C. A 50.0 g sample of a metal at 100.0 °C is dropped in this calorimeter and causes the temperature to increase a total of 5.4 °C. What is the specific heat of the metal? | 0.96 J/g∙°C
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| 2.10 A 345.1 g sample of copper at 100.0 °C is dropped into a 4.5 g calorimeter made of an unknown substance. If the calorimeter has 150.0 g of water in it and the temperature changed from 24.2 °C to 25.1 °C, what is the specific heat of the calorimeter? | -169 J/g∙°C
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
LiseBrinkley
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