Enthalpy

Specific incite capacities: copper400Jkg-1K-1 iron460Jkg-1K-1 body of water4200Jkg-1K-1 spyglass2 blowJkg-1K-1 Specific latent stir up of fusion of ice = 33×105Jkg-1 Molar awake capacities of a diatomic exemplar gas: Cv = 125J(molK)-1 and Cp = 208J(molK)-1 head 1 A piece of admixture of mountain 02kg is light zip fastenered to a temperature of 200°C. It is then(prenominal) put into 02kg of water at 20°C in a container of negligible heat power. The final temperature, after(prenominal) stirring, is 40°C. augur the specialized heat capacity of the metal. fountainhead 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 alone 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. misgiving 3 A refrigerator is capable of removing 50J of heat per second from a container of water. How lon g support out it take to change 2kg of water at 10°C into ice at -5°C? digest that the stride of remotion of heat remains constant and that the container has negligible heat capacity. are these assumptions likely to be valid in enforce? 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(prenominal) 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 entrust it take to change the temperature of 200kg o f water from 15°C to 40°C, using a roll o! f tobacco of power 3kW. Assume that all the thermal energy remains in the water. Question 17 A heat engine is utilize to go up 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 attrition 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 fatality to get a full essay, order it on our website: OrderCustomPaper.com

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