Last week during the "polar vortex" imagine you put a cup of water outside. It was...
Last week during the "polar vortex" imagine you put a cup of water outside. It was cold enough long enough that the ice would have eventually been the same temperature as the air temperature, say - 20 degrees Fahrenheit.
3. It is now a cup of water. How much more heat needs to be added to bring this water up to "room temperature"?
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Last week during the "polar vortex" imagine you put a cup of
water outside. It was...
A cup containing 200 g of water is sitting on your dining room table. After carefully...
A cup containing 200 g of water is sitting on your dining room table. After carefully measuring its temperature to be 20-degrees Celsius, you leave the room. Returning 10 minutes later, you measure its temperature again and find that it is now 25-degrees Celsius. What can you conclude about the amount of heat added to the water? (HINT: trick question)
(i) If you put a glass of water in a microwave and bring it to boiling...
(i) If you put a glass of water in a microwave and bring it to boiling temperature, is the energy supplied as heat or work? Explain briefly in 1-2 sentences (ii) Estimate how long it would take in a typical 900-watt microwave to boil a cup of water Assume any reasonable initial temperature for the water
I don't know why the last two are wrong. To calibrate your calorimeter cup, you first...
I don't know why the last two are
wrong.
To calibrate your calorimeter cup, you first put 47 mL of cold water in the cup, and measure its temperature to be 25.9 °C. You then pour 49 mL of hot water, temperature = 49.9 °C, into the cup and measure the temperature every thirty seconds over a 10 minute period. You extrapolate this "cooling curve" back to the time of addition and find that the "final temperature" after mixing is...
You drop an ice cube into an insulated container full of water and wait for the...
You drop an ice cube into an insulated container full of water and wait for the ice cube to completely melt. The ice cube initially has a mass of 80.0 g and a temperature of 0°C. The water (before the ice cube is added) has a mass of 660 g and an initial temperature of 20.0°C. What is the final temperature (in °C) of the mixture? (Assume no energy is lost to the walls of the container, or to the...
Problem2 (a) Suppose outside temperature is 55 °F while the temperature inside a building is 72 F. The building is heated but not air conditioned, so the partial pressure of water vapor is the sa...
Problem2 (a) Suppose outside temperature is 55 °F while the temperature inside a building is 72 F. The building is heated but not air conditioned, so the partial pressure of water vapor is the same both inside and outside the building. Finally, suppose the dew point outside is 40°F What is the dew point inside? What are the relative humidities inside and outside the building? (We are most comfortable if relative humidity is between 30% and 50%-This question shows why...
reallt need help with the questions which are numbered aswelll helo with the last four cells...
reallt need help with the questions which are numbered aswelll
helo with the last four cells on part IV data tabel
Part II Prediction: 4) What is the final temperature of a mixture containing -50 g of hot water (about 90 °C) and -50 g of water at room temperature? 5) What happens to the final temperature if the mass of the cold water is halved while that of the hot water is increased while maintaining a total mixture of...
Exercise 5: I was changing 34 around too much that I just made it a separate...
Exercise 5: I was changing 34 around too much that I just made it a separate exercise. Suppose 310. grams of ethanol (ethyl alcohol) is in an aluminum cup of 90.0 grams. Both of these are at 30.0C. A mass m of ice at - 8.5C is taken from a freezer and added to the alcohol in the cup. The final temperature of all the components is 18.0C. Assuming no heat was lost from the system, calculate the mass m...
Heat opens up capillaries and improves blood flow. The reverse is true too: cold capillaries close...
1. Heat opens capillaries and improves blood flow. The reverse is true too: cold capillaries close. Thus, for a black eye where you want to prevent blood buildup causing painful swelling, you use ice. Now consider a patient who is told to keep hot compresses on an eye infection for 10 minutes. She discovers that her compress is no longer hot after only 5 minutes and therefore wants to keep it warm twice as long. Is the better strategy to use...
ak home Scraping ice off the window of my car is no fun, how much heat...
ak home Scraping ice off the window of my car is no fun, how much heat would be required to melt 2-5 grams of ice using a hairblow dryer? Practice the following heat equation problems. 1. After a long day of school, your walk home 4. Scrap through the brisk fall air has given you the craving for hot chocolate. Calculate the Equation nece amount of heat necessary to warm 100 grams of milk from 100°C to 150 °C. (specific...
What is the volume of the sphere in Procedure 2 in units of cm3? Express your...
What is the volume of the sphere in Procedure 2 in units of
cm3? Express your answer to two significant figures.
LAB 14: IDEAL GAS LAW BASIC CONCEPTS TEXTBOOK: SECTIONS 15.2, YOUNG, 10TH EDITION DEFINITIONS Volume: The space taken up by an object, measured in cubic meters (m"). Pressure: For an enclosed gas, pressure is defined as the force exerted per area by the gas on the container walls, measured in Pascal (1 N/m) Temperature: A measure of the average...
(i) If you put a glass of water in a microwave and bring it to boiling temperature, is the energy supplied as heat or work? Explain briefly in 1-2 sentences (ii) Estimate how long it would take in a typical 900-watt microwave to boil a cup of water Assume any reasonable initial temperature for the water
I don't know why the last two are
wrong.
To calibrate your calorimeter cup, you first put 47 mL of cold water in the cup, and measure its temperature to be 25.9 °C. You then pour 49 mL of hot water, temperature = 49.9 °C, into the cup and measure the temperature every thirty seconds over a 10 minute period. You extrapolate this "cooling curve" back to the time of addition and find that the "final temperature" after mixing is...
Problem2 (a) Suppose outside temperature is 55 °F while the temperature inside a building is 72 F. The building is heated but not air conditioned, so the partial pressure of water vapor is the same both inside and outside the building. Finally, suppose the dew point outside is 40°F What is the dew point inside? What are the relative humidities inside and outside the building? (We are most comfortable if relative humidity is between 30% and 50%-This question shows why...
reallt need help with the questions which are numbered aswelll
helo with the last four cells on part IV data tabel
Part II Prediction: 4) What is the final temperature of a mixture containing -50 g of hot water (about 90 °C) and -50 g of water at room temperature? 5) What happens to the final temperature if the mass of the cold water is halved while that of the hot water is increased while maintaining a total mixture of...
Exercise 5: I was changing 34 around too much that I just made it a separate exercise. Suppose 310. grams of ethanol (ethyl alcohol) is in an aluminum cup of 90.0 grams. Both of these are at 30.0C. A mass m of ice at - 8.5C is taken from a freezer and added to the alcohol in the cup. The final temperature of all the components is 18.0C. Assuming no heat was lost from the system, calculate the mass m...
ak home Scraping ice off the window of my car is no fun, how much heat would be required to melt 2-5 grams of ice using a hairblow dryer? Practice the following heat equation problems. 1. After a long day of school, your walk home 4. Scrap through the brisk fall air has given you the craving for hot chocolate. Calculate the Equation nece amount of heat necessary to warm 100 grams of milk from 100°C to 150 °C. (specific...
What is the volume of the sphere in Procedure 2 in units of
cm3? Express your answer to two significant figures.
LAB 14: IDEAL GAS LAW BASIC CONCEPTS TEXTBOOK: SECTIONS 15.2, YOUNG, 10TH EDITION DEFINITIONS Volume: The space taken up by an object, measured in cubic meters (m"). Pressure: For an enclosed gas, pressure is defined as the force exerted per area by the gas on the container walls, measured in Pascal (1 N/m) Temperature: A measure of the average...
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