Homework Answers
The sp. ht of ethanol and water are 2.44 J/g°C and 4.18 J/g°C respectively ,
Therefore, to increase temperature of 1g ethenol by 1°C requires
2.44 joules of thermal energy and that of water requires 4.18
joule
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Draw two lines to show how the temperature changes when equal amounts of thermal energy are...
Identical amounts of thermal energy are added to each of three isolated, equal-mass samples A, B,...
Identical amounts of thermal energy are added to each of three isolated, equal-mass samples A, B, and C of unknown substances. If their temperature changes are ordered as ΔTA > ΔTB > ΔTC, which sample has the largest specific heat?
1. Compare two cups of water of the same mass one at 25ºC and the other...
1. Compare two cups of water of the same mass one at 25ºC and the other at 85ºC. When each is contacted to a large object of temperature T, which statement is correct? Group of answer choices a. The heat transfer depends on the temperature of the large object. b. The 85°C cup of water transfers more heat. c. The 25°C cup of water transfers more heat. d. They transfer the same total amount of heat. 2.. Imagine you transfer...
A solution is made by mixing 285.0 mL of ethanol initially at 11.7 C with 285.0...
A solution is made by mixing 285.0 mL of ethanol initially at 11.7 C with 285.0 mL of water initially at 21.9 °C. What is the final temperature of the solution assuming that no heat is lost? The density of ethanol is 0.789 g/mL and the density of water is 1.00 g/mL. The specific heat of ethanol is 2.46 J/g.°C and the specific heat of water is 4.184 J/g °C. Ti = "C The specific heat capacities for several substances...
How much heat is evolved when 22.5 grams of a food sample changes the temperature of...
How much heat is evolved when 22.5 grams of a food sample changes the temperature of 0.54 kg of water by 5.2 degree C. Assume specific heat to be 4.18 J/g/C
Example - How many joules of energy must a cup of coffee lose for its temperature...
Example - How many joules of energy must a cup of coffee lose for its temperature to drop from 60.0°C to the temperature of your body (37.0°C)? Assume that the cup holds 250. mL of coffee (with a density of 1.00 g/mL) and that the specific heat of coffee is the same as water (4.18 J/g°C).
When rubidium ions are heated to a high temperature, two lines are observed in its line...
When rubidium ions are heated to a high temperature, two lines are observed in its line spectrum at wavelengths (a) 7.67 x 10-7 m and (b) 3.99 x 10-7 m. What are the frequencies of the two lines? What color are the lines? Choose the answer that best completes the following: The existence of atomic line spectra indicates that. . . the energy of a photon depends on its frequency. all orbitals in s subshells must be spherical in shape....
I know the answers but I don't know how to solve the work. Please show the...
I know the answers but I don't know how to solve the work.
Please show the work
1.)
Answer: D
2.)
Answer: D
3.)
Answer: A
Aluminum has a specific heat of 0.902 J/g.°C. How many joules of heat are required to change the temperature of 8.50 grams of aluminum from 25.0°C to 93.4°C? a. 7.67 J b. 71.7 J c. 192J d. 524 J Water has a specific heat of 4.18 J/g. °C. If 35.0 g of water at...
A precipitate will form when aqueous AgNO3 is added to an aqueous solution of which compound?...
A precipitate will form when aqueous AgNO3 is added to an aqueous solution of which compound? Group of answer choices LiCl NH4C2H3O2 NaNO3 KNO3 If 50.0 g H2O at 13.6 °C is combined with 85.0 g H2O at 93.7 °C, which is most likely to be true? Group of answer choices The final temperature of the water is between 13.6°C and 93.7°C The final temperature of the water is lower than 13.6 °C The final temperature of the water is...
Which of the following processes requires the largest input of energy as heat? raising the temperature...
Which of the following processes requires the largest input of energy as heat? raising the temperature of 100 g of water by 1.0 ° C vaporization of 0.10 g of water at 100 ° C melting 1.0 g of ice at 0° C warming 1.0 g of ice from -50° C to 0° C (Specific heat of ice = 2.06 J / g. k) Ice (5.0 g) at 0°C is added to 25 g of liquid water at 20°C. Which...
Part A State the law of conservation of energy The law of conservation of energy states...
Part A State the law of conservation of energy The law of conservation of energy states that energy can neither be created or destroyed. Energy can be transferred from one object to another, and it can assume different forms. The law of conservation of energy states that energy can not be created but it can be destroyed. Energy can be transferred from one object to another can be destroyed in a chemical reaction, and it can assumo different forms The...
A solution is made by mixing 285.0 mL of ethanol initially at 11.7 C with 285.0 mL of water initially at 21.9 °C. What is the final temperature of the solution assuming that no heat is lost? The density of ethanol is 0.789 g/mL and the density of water is 1.00 g/mL. The specific heat of ethanol is 2.46 J/g.°C and the specific heat of water is 4.184 J/g °C. Ti = "C The specific heat capacities for several substances...
How much heat is evolved when 22.5 grams of a food sample changes the temperature of 0.54 kg of water by 5.2 degree C. Assume specific heat to be 4.18 J/g/C
Example - How many joules of energy must a cup of coffee lose for its temperature to drop from 60.0°C to the temperature of your body (37.0°C)? Assume that the cup holds 250. mL of coffee (with a density of 1.00 g/mL) and that the specific heat of coffee is the same as water (4.18 J/g°C).
I know the answers but I don't know how to solve the work.
Please show the work
1.)
Answer: D
2.)
Answer: D
3.)
Answer: A
Aluminum has a specific heat of 0.902 J/g.°C. How many joules of heat are required to change the temperature of 8.50 grams of aluminum from 25.0°C to 93.4°C? a. 7.67 J b. 71.7 J c. 192J d. 524 J Water has a specific heat of 4.18 J/g. °C. If 35.0 g of water at...
Part A State the law of conservation of energy The law of conservation of energy states that energy can neither be created or destroyed. Energy can be transferred from one object to another, and it can assume different forms. The law of conservation of energy states that energy can not be created but it can be destroyed. Energy can be transferred from one object to another can be destroyed in a chemical reaction, and it can assumo different forms The...
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