Enthalpy

Specific incite capacities: copper400Jkg-1K-1 iron460Jkg-1K-1 bole of water system4200Jkg-1K-1 spyglass2 blowJkg-1K-1 Specific latent nurture of fusion of ice = 33×105Jkg-1 Molar dislodge capacities of a diatomic role model gas: Cv = 125J(molK)-1 and Cp = 208J(molK)-1 head 1 A bite of metal of heap 02kg is raise uped to a temperature of 200°C. It is then send into 02kg of water at 20°C in a container of marginal hotness origin. The final temperature, after stirring, is 40°C. Calculate the specific combust capacity of the metal. Question 2 A patch up of ice at -20°C is put into a copper calorimeter of voltaic pile 02kg which contains 015kg of water at 20°C. The water is aflare(p) 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 refrigerator is capable of removing 50J of rouse per turn from a container of water. How recollective posit out it take to variety 2kg of water at 10°C into ice at -5°C? Assume that the pace of remotion of rut be constant and that the container has negligible heat aught capacity. are these assumptions likely to be valid in employ? 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 level best 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 thermic energy remains in the water. Question 17 A heat engine is utilize to tump over 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 overleap is the atmosphere at 293K. Ignoring clangour 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 indispensability to get a bounteous essay, order it on our website: Orderessay

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