1. Find the atmospheric (or barometric) pressure in your area using the newspaper, televi- sion, or...

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1. Find the atmospheric (or barometric) pressure in your area using the newspaper, televi- sion, or another news outlet. What units are used? Convert to mmHg. Convert to mmH₂O. 2. Should atmospheric pressure increase or decrease as one goes from the beach to the mountains? Explain. 3. If the column of water in the water barometer rose to a height of 35 feet, what would be the atmospheric pressure in mmHg? 4. After you set up your apparatus for the second part of the experiment, your group be- gins to add the textbooks on top of the plunger. It appears that the plunger continues to drop with every added book and does not return to its original place after the books are removed. What possible sources of error could be given for this experimental outcome? Be specific and give at least two reasons. 1. Find and report literature values for the specific heats of the metals used in this experi- ment at room temperature. 2. Compare the specific heats of the metals with their atomic weights (i.e., molar masses). Do you see any trends? Make a plot to show this relationship. What does the plot reveal? 3. You are performing the calibration step of this experiment and you begin with 50 g of water at 20°C and 50 g of water at 80°C. After adding the two in your calorimeter setup and following the procedure outlined in the experiment, you determine the temperature of the mixed solutions to be 45°C. What is the heat capacity of the calorimeter? 1. If a hydrate of the formula MCI, XH₂O decomposes when heated to produce HCI, what change would you expect to occur when a piece of blue litmus paper is held in the path of the vapor that is released? Explain. 2. After 0.6523 g of CoCl₂ 6 H₂O is heated, the residue has a mass of 0.3423 g. Calculate the percent H₂O in the hydrate. What is the formula of the hydrate? 3. What safety precautions are necessary in this experiment? 4. CoCl₂ is often used in hygrometers. Search the Internet to determine why. How does this relate to the experiment? 1. Find the atmospheric (or barometric) pressure in your area using the newspaper, televi- sion, or another news outlet. What units are used? Convert to mmHg. Convert to mmH₂O. 2. Should atmospheric pressure increase or decrease as one goes from the beach to the mountains? Explain. 3. If the column of water in the water barometer rose to a height of 35 feet, what would be the atmospheric pressure in mmHg? 4. After you set up your apparatus for the second part of the experiment, your group be- gins to add the textbooks on top of the plunger. It appears that the plunger continues to drop with every added book and does not return to its original place after the books are removed. What possible sources of error could be given for this experimental outcome? Be specific and give at least two reasons. 1. Find and report literature values for the specific heats of the metals used in this experi- ment at room temperature. 2. Compare the specific heats of the metals with their atomic weights (i.e., molar masses). Do you see any trends? Make a plot to show this relationship. What does the plot reveal? 3. You are performing the calibration step of this experiment and you begin with 50 g of water at 20°C and 50 g of water at 80°C. After adding the two in your calorimeter setup and following the procedure outlined in the experiment, you determine the temperature of the mixed solutions to be 45°C. What is the heat capacity of the calorimeter? 1. If a hydrate of the formula MCI, XH₂O decomposes when heated to produce HCI, what change would you expect to occur when a piece of blue litmus paper is held in the path of the vapor that is released? Explain. 2. After 0.6523 g of CoCl₂ 6 H₂O is heated, the residue has a mass of 0.3423 g. Calculate the percent H₂O in the hydrate. What is the formula of the hydrate? 3. What safety precautions are necessary in this experiment? 4. CoCl₂ is often used in hygrometers. Search the Internet to determine why. How does this relate to the experiment?

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1 Atmospheric pressure is typically measured in hectopascals hPa or millibars mb To convert from hPa to mmHg one can multiply the hPa ... View the full answer