Homework Answers
Question 1.
If the dry ice has a film of liquid water on them, then the dry ice slowly comes to room temperature and completely disappears as its boiling point is very low (-78 oC).
Question 2.
If the average initial temperature was -10 oC instead of -15 oC, some of the dry ice disappears due to its evaporation.
Note: Dry ice is a solid carbon dioxide.
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1. The procedure specified DRY ice cubes. How would the results be impacted if the ice...
1 Why do ice cubes shrink and become rounded if left in the freezer for a...
1 Why do ice cubes shrink and become rounded if left in the freezer for a long time? 2 At the triple point of water, ice, liquid water, and water vapor can all exist at the same time. Compare the kinetic energy and total energy of the molecules of ice, liquid water and water vapor at the triple point.
If 2.50 kg of dry ice (solid carbon dioxide) is added to 1 5.0 L of...
If 2.50 kg of dry ice (solid carbon dioxide) is added to 1 5.0 L of water with an initial temperature of 24.0 degree C what is the temperature of the water when all of the dry ice has sublimed? For CO_2, the enthalpy of sublimation is 25.2 kJ/mol.
16) IN ORDER TO MAKE ICE CUBES (WHICH AREN'T REALLY CUBES), THE ICEMAKER IN A REFRIGERATOR...
16) IN ORDER TO MAKE ICE CUBES (WHICH AREN'T REALLY CUBES), THE ICEMAKER IN A REFRIGERATOR LETS IN 290 GRAMS OF LIQUID WATER AT AN ORIGINAL TEMPERATURE OF 16°C, TURNS IT SOLID WATER AT OC, AND COOLS THE ICE TO -10°C. FOR EACH BATCH OF ICE , How MUCH THERMAL ENERGY MUST BE REMOVED ? ΤΟ (A) 25,000 J (B) 6 1,000 J (C) 97,000 J (D) 122,000 J 10 E(N) 4 + 20+ A NON - CONSTANT FORCE ACTS...
A refrigerator has a COP of 5.5 how much work is needed to make ice cubes...
A refrigerator has a COP of 5.5 how much work is needed to make ice cubes from 1 liter of water at 10 degrees celcius? hint: 1 liter of water = how many kilograms? c= 4184 jouls / kgkelvin latent heat of fusion os water is 333500 j/kg
Approximately how many ice cubes must melt to cool 1150 milliliters of water from 29°C to...
Approximately how many ice cubes must melt to cool 1150 milliliters of water from 29°C to 0°C? Assume that each ice cube contains 1 mole of H2O and is initially at 0°C. ∆H(fusion) = 6.02 kJ/mol; ∆H(vaporization) = 40.7 kJ/mol c(solid) = 2.09 J/g°C; c(liquid) = 4.18 J/g°C; c(gas) = 1.97 J/g°C Enter your answer numerically.
9. Four ice cubes exactly at-50 °C with a total mass of 53.5 g are combined with 1 15 g of water at 75 °C in an insulated container. If no heat is lost to the surroundings, what is the final tempe...
9. Four ice cubes exactly at-50 °C with a total mass of 53.5 g are combined with 1 15 g of water at 75 °C in an insulated container. If no heat is lost to the surroundings, what is the final temperature of the mixture? The heat capacity of ice is 2.03 JIg C and that of water is 4.18 JIg C. The heat of fusion of water is +6.01 kJ/mol. (1.5 pts)
9. Four ice cubes exactly at-50 °C...
Three ice cubes (55 g each) at 0.00 °C are dropped into 2.00 cups (kitchen measuring...
Three ice cubes (55 g each) at 0.00 °C are dropped into 2.00 cups (kitchen measuring cups) of tea. The tea was at room temperature (25.0 °C) before the ice was added. After the ice and tea have been mixed and thermal equilibrium has been established the temperature of the tea was 0.0 °C. How much ice remains floating in the tea? Use these information to solve these questions: cp for tea or water is 4.184 J · g −1...
(9%) Problem 10: Several ice cubes (@; = 0.9167 g/cm) of total volume V, -225 cm'...
(9%) Problem 10: Several ice cubes (@; = 0.9167 g/cm) of total volume V, -225 cm' and temperature 273,15 K (0.000 °C) are put into a thermos containing V, - 570 cm of tea at a temperature of 313.15 K. completely filling the thermos. The lid is then put on the thermos to close it. Assume that the density and the specific heat of the tea is the same as it is for fresh water (=1.00 g/em'.c=4186J/kgK). *33% Part (a)...
Write out the formula. Isolate Tf variable then solve 1.Three ice cubes are used to chill...
Write out the formula.
Isolate Tf variable then solve
1.Three ice cubes are used to chill a soda at 20°C with mass msoda -0.25 kg. The ice is at 0°C and each ice cube has a mass of 6.0 g. Assume that the soda is kept in a foam container so that heat loss can be ignored. Assume the soda has the same heat capacity as water. Find the final temperature when all ice has melted. (Cw 4186 J/kg.eC, Lt-334,000...
ch.11 Four ice cubes at exactly 0 ºC with a total mass of 52.0 g are...
ch.11
Four ice cubes at exactly 0 ºC with a total mass of 52.0 g are combined with 135 g of water at 90 °C in an insulated container. (AH..-6.02 kJ/mol. Cwater-4.18J/ 6C) V Part A If no heat is lost to the surroundings, what is the final temperature of the mixture? Express your answer using two significant figures. OVO AXT ? Given that the heat of freezing of water is-6.02 kJ/mol, that the heat capacity of H.O() is 752...
If 2.50 kg of dry ice (solid carbon dioxide) is added to 1 5.0 L of water with an initial temperature of 24.0 degree C what is the temperature of the water when all of the dry ice has sublimed? For CO_2, the enthalpy of sublimation is 25.2 kJ/mol.
16) IN ORDER TO MAKE ICE CUBES (WHICH AREN'T REALLY CUBES), THE ICEMAKER IN A REFRIGERATOR LETS IN 290 GRAMS OF LIQUID WATER AT AN ORIGINAL TEMPERATURE OF 16°C, TURNS IT SOLID WATER AT OC, AND COOLS THE ICE TO -10°C. FOR EACH BATCH OF ICE , How MUCH THERMAL ENERGY MUST BE REMOVED ? ΤΟ (A) 25,000 J (B) 6 1,000 J (C) 97,000 J (D) 122,000 J 10 E(N) 4 + 20+ A NON - CONSTANT FORCE ACTS...
9. Four ice cubes exactly at-50 °C with a total mass of 53.5 g are combined with 1 15 g of water at 75 °C in an insulated container. If no heat is lost to the surroundings, what is the final temperature of the mixture? The heat capacity of ice is 2.03 JIg C and that of water is 4.18 JIg C. The heat of fusion of water is +6.01 kJ/mol. (1.5 pts)
9. Four ice cubes exactly at-50 °C...
(9%) Problem 10: Several ice cubes (@; = 0.9167 g/cm) of total volume V, -225 cm' and temperature 273,15 K (0.000 °C) are put into a thermos containing V, - 570 cm of tea at a temperature of 313.15 K. completely filling the thermos. The lid is then put on the thermos to close it. Assume that the density and the specific heat of the tea is the same as it is for fresh water (=1.00 g/em'.c=4186J/kgK). *33% Part (a)...
Write out the formula.
Isolate Tf variable then solve
1.Three ice cubes are used to chill a soda at 20°C with mass msoda -0.25 kg. The ice is at 0°C and each ice cube has a mass of 6.0 g. Assume that the soda is kept in a foam container so that heat loss can be ignored. Assume the soda has the same heat capacity as water. Find the final temperature when all ice has melted. (Cw 4186 J/kg.eC, Lt-334,000...
ch.11
Four ice cubes at exactly 0 ºC with a total mass of 52.0 g are combined with 135 g of water at 90 °C in an insulated container. (AH..-6.02 kJ/mol. Cwater-4.18J/ 6C) V Part A If no heat is lost to the surroundings, what is the final temperature of the mixture? Express your answer using two significant figures. OVO AXT ? Given that the heat of freezing of water is-6.02 kJ/mol, that the heat capacity of H.O() is 752...
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