Question

In: Physics

1) An ice cube of mass m at 0 ?C is placed in a large 20...

1) An ice cube of mass m at 0 ?C is placed in a large 20 ?C room. Heat flows (from the room to the ice cube) such that the ice cube melts and the liquid water warms to 20 ?C. The room is so large that its temperature remains nearly 20 ?C at all times. Calculate the change in entropy for the (water + room) system due to this process. Assume that m is in kg.


2) A mass m of liquid water at 20 ?C is placed in a large 20 ?C room. Heat flows (from the water to the room) such that the liquid water cools to 0 ?C and then freezes into a 0 ?C ice cube. The room is so large that its temperature remains 20 ?C at all times. Calculate the change in entropy for the (water + room) system due to this process. Assume that m is in kg.


Express your answers in terms of m only.

Solutions

Expert Solution


Related Solutions

a) A(n) 85-g ice cube at 0°C is placed in 920 g of water at 20°C....
a) A(n) 85-g ice cube at 0°C is placed in 920 g of water at 20°C. What is the final temperature of the mixture? b) A 103-g cube of ice at 0°C is dropped into 1.0 kg of water that was originally at 87°C. What is the final temperature of the water after the ice has melted? c) An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 432-g sample of silver at...
A 65 g ice cube at 0 °C is placed in an insulated box that contains...
A 65 g ice cube at 0 °C is placed in an insulated box that contains 8 g of steam at 200 °C. What is the equilibrium temperature reached by this closed system? Approximate the specific heat capacity of steam to be 1.5 J/g oC. All the other values can be found on the textbook. [Note: Assume that all of the steam condenses.]
1. A 100 g ice cube at -10?C is placed in an aluminum cup whose initial...
1. A 100 g ice cube at -10?C is placed in an aluminum cup whose initial temperature is 70?C. The system comes to an equilibrium temperature of 20?C. What is the mass of the cup in kg. 2.Radiation from the head is a major source of heat loss from the human body. Model a head as a 20-cm-diameter, 20-cm-tall cylinder with a flat top.If the body's surface temperature is 36 ?C , what is the net rate of heat loss...
A 24 g ice cube at -76°C is placed in a lake whose temperature is 82°C....
A 24 g ice cube at -76°C is placed in a lake whose temperature is 82°C. Calculate the change in entropy of the cube-lake system as the ice cube comes to thermal equilibrium with the lake. The specific heat of ice is 2220 J/kg·K. (Hint: Will the ice cube affect the temperature of the lake?)
A 43 g ice cube at -69°C is placed in a lake whose temperature is 81°C....
A 43 g ice cube at -69°C is placed in a lake whose temperature is 81°C. Calculate the change in entropy of the cube-lake system as the ice cube comes to thermal equilibrium with the lake. The specific heat of ice is 2220 J/kg·K. (Hint: Will the ice cube affect the temperature of the lake?)
A 73 g ice cube at -45°C is placed in a lake whose temperature is 76°C....
A 73 g ice cube at -45°C is placed in a lake whose temperature is 76°C. Calculate the change in entropy of the cube-lake system as the ice cube comes to thermal equilibrium with the lake. The specific heat of ice is 2220 J/kg·K.
A 56 g ice cube at -57°C is placed in a lake whose temperature is 33°C....
A 56 g ice cube at -57°C is placed in a lake whose temperature is 33°C. Calculate the change in entropy of the cube-lake system as the ice cube comes to thermal equilibrium with the lake. The specific heat of ice is 2220 J/kg·K. (Hint: Will the ice cube affect the temperature of the lake?)
A 70.0 g ice cube at 0.0 degrees C is placed in a lake whose temperature...
A 70.0 g ice cube at 0.0 degrees C is placed in a lake whose temperature is 18.0 degrees C. Calculate the change in entropy (in joules/Kelvin) of the system as the ice cube comes to thermal equilibrium with the lake. (c for water = 4186 J/kg-K)
A 0.5530-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. Later,...
A 0.5530-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. Later, you notice that the ice cube has completely melted into a puddle of water. If the chamber initially contained 6.790 moles of steam (water) molecules before the ice is added, calculate the final temperature of the puddle once it settled to equilibrium. (Assume the chamber walls are sufficiently flexible to allow the system to remain isobaric and consider thermal losses/gains from the chamber walls...
A 0.5530-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. Later,...
A 0.5530-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. Later, you notice that the ice cube has completely melted into a puddle of water. If the chamber initially contained 6.310 moles of steam (water) molecules before the ice is added, calculate the final temperature of the puddle once it settled to equilibrium. (Assume the chamber walls are sufficiently flexible to allow the system to remain isobaric and consider thermal losses/gains from the chamber walls...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT