Enthalpy

Specific incite capacities:
copper400Jkg-1K-1
iron460Jkg-1K-1
body of water4200Jkg-1K-1
spyglass2 blowJkg-1K-1
Specific latent arouse of fusion of ice = 33×105Jkg-1
Molar heat capacities of a diatomic exemplar gas:
Cv = 125J(molK)-1 and Cp = 208J(molK)-1
head 1
A piece of metal of mass 02kg is heated to a temperature of 200°C. It is then put into 02kg of water at 20°C in a container of negligible heat power. The final temperature, after stirring, is 40°C. Calculate the specific heat capacity of the metal.
Question 2
A piece of ice at -20°C is put into a copper calorimeter of mass 02kg which contains 015kg of water at 20°C. The water is aflame until all the ice has melted. At this time the temperature of the water (and calorimeter) is 15°C. Calculate the mass of the piece of ice.
Question 3
A icebox is capable of removing 50J of heat per second from a container of water. How long get out it take to change 2kg of water at 10°C into ice at -5°C? Assume that the rate of remotion of heat remains constant and that the container has negligible heat capacity. are these assumptions likely to be valid in practice?
Question 4
A piece of metal of mass 100g, has a temperature of 100°C. It is put into 100g of water at 20°C in a container of negligible heat capacity.



After stirring, the maximum temperature of the change (metal and water) is 275°C. Calculate the specific heat capacity of the metal.
Question 5
How long will it take to change the temperature of 200kg of water from 15°C to 40°C, using a roll of tobacco of power 3kW. Assume that all the thermal energy remains in the water.

Question 17
A heat engine is utilize to lift a mass of 200kg. The mass moves 10m vertically upwards. The temperature of the book of facts of the heat engine is 1000K and the heat sink is the atmosphere at 293K. Ignoring friction in the engine, pulleys etc, calculate the minimum quantity of thermal energy needed to lift the mass.

2. A 2.15-gram cashew junky is burned. The heat...If you want to get a full essay, order it on our website: Ordercustompaper.com



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