Question

In: Physics

A thermos contains 150cm3 of coffee at 85◦C. To cool the coffee, you drop two 11g...

A thermos contains 150cm3 of coffee at 85◦C. To cool the coffee, you
drop two 11g ice cubes into the thermos. The ice cubes are initially at −10◦C and melt completely. What is the final temperature of the coffee? Treat the coffee as if it were water. Cice =2×103J/kg/◦C, CH2O =4186J/kg/◦C, Lf H2O =3.35×105J/kg.

Solutions

Expert Solution


Related Solutions

An insulated Thermos contains 145 g of water at 70.7 ˚C. You put in a 11.0...
An insulated Thermos contains 145 g of water at 70.7 ˚C. You put in a 11.0 g ice cube at 0.00 ˚C to form a system of ice + original water. The specific heat of liquid water is 4190 J/kg•K; and the heat of fusion of water is 333 kJ/kg. What is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?
An insulated Thermos contains 128 g of water at 81.3 ˚C. You put in a 12.5...
An insulated Thermos contains 128 g of water at 81.3 ˚C. You put in a 12.5 g ice cube at 0.00 ˚C to form a system of ice + original water. The specific heat of liquid water is 4190 J/kg•K; and the heat of fusion of water is 333 kJ/kg. What is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?
A hot cup of black coffee (85°C) is placed on a tabletop (22°C) where it remains....
A hot cup of black coffee (85°C) is placed on a tabletop (22°C) where it remains. The surrounding room is at a temperature of 22°C. The cup is cylindrical in shape with a height of 15.0 cm and an outside diameter of 8.00 cm. The cup is made of ceramic with a thermal conductivity of 0.84 W/m°C. The outside of the cup has a temperature of 60°C and the cup is 6.0 mm in thickness. A slight breeze is blowing...
Using an ice bath, cool 10mL of saturated sodium bisulfite solution; then add, drop by drop,...
Using an ice bath, cool 10mL of saturated sodium bisulfite solution; then add, drop by drop, 5mL of 2-pentanone. Stir the solution until there is precipitation of a solid. Add 25 mL of ethanol to encourage precipitation; then filter the crystals and wash them with 5 ml of ethanol. The product is a bisulfite addition adduct. What makes the Bisulfite product soluble in 10% NaOH but insoluble in 10% HCl. What does ethanol do to the product in this reaction?...
Cool Beans is a locally owned coffeeshop that competes with two large coffee chains, PlanetEuro and...
Cool Beans is a locally owned coffeeshop that competes with two large coffee chains, PlanetEuro and Frothies. Alicia, the owner, is considering two different marketing promotions and thinks that CLV analysis will help her decide the best course of action. An average specialty coffee drink sells for $4.20 and has a margin of 76%. One promotion is providing loyalty cards to her regular customers that would give them one free specialty coffee drink after 10 regular purchases. Alicia estimates that...
Alicia is the owner-operator of Cool Beans, a local coffee shop. For the past year, Cool...
Alicia is the owner-operator of Cool Beans, a local coffee shop. For the past year, Cool Beans sold 280,000 drinks at an average price of $2.92 per serving. Her average variable cost per serving was $1.40. Currently, she has been using local TV and newspapers to generate interest and awareness at a cost of $144,000 per year. She recently contacted Brushfire Social Media and they estimated they could reach the same number of people in her community with a social...
A- a small volume of cold water is used to cool off a cup of coffee...
A- a small volume of cold water is used to cool off a cup of coffee that is initially too hot to drink. How many mL of water at 4.0oC must be mixed with 485 mL of hot coffee (95.0oC) so that the resulting combination has a temperature of 70.0oC? Assume that the coffee and water have the same density and specific heat.    B- A 5.00 cm3 sample of aluminum at room temperature (25.00oC) was dropped into a 1 L...
A mass m = 85 kg slides on a frictionless track that has a drop, followed...
A mass m = 85 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 18.9 m and finally a flat straight section at the same height as the center of the loop (18.9 m off the ground). Since the mass would not make it around the loop if released from the height of the top of the loop (do you know why?) it must be released above the top of the...
A coffee-cup calorimeter contains 130.0 g of water at 25.3 ∘C . A 124.0-g block of...
A coffee-cup calorimeter contains 130.0 g of water at 25.3 ∘C . A 124.0-g block of copper metal is heated to 100.4 ∘C by putting it in a beaker of boiling water. The specific heat of Cu(s) is 0.385 J/g⋅K . The Cu is added to the calorimeter, and after a time the contents of the cup reach a constant temperature of 30.3 ∘C . Part A Determine the amount of heat, in J , lost by the copper block....
A coffee cup calorimeter contains 152.18 g of water at 20.90 °C. A 55.336 g piece...
A coffee cup calorimeter contains 152.18 g of water at 20.90 °C. A 55.336 g piece of iron is heated to 98.37 °C. The piece of iron is added to the coffee cup caloriemter and the contents reach thermal equilibrium at 23.60 °C. The specific heat capacity of iron is 0.449 J g⋅K and the specific heat capacity of water is 4.184 J g⋅K . How much heat, q , is lost by the piece of iron? How much heat,...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT