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Question 13 : If a gas absorbs 1000 J of heat and expands by 0.5 d m 3 dm3 against a constant pressure of 4 atms (1 atm = 100000 Pa), then the change in internal energy is approximately -800 J 1200 J -1200 J 800 J Question 14 : The specific heat of silver is 0.0565 c a l / g / o C cal/g/oC. Assuming no loss of heat to the surroundings or to the container, calculate the final temperature when 100 g of silver at 40 o C oC is immersed in 60 g of water at 10 o C oC. 21.6 o C oC. 25 o C oC 12.6 o C oC 16.2 o C oC Question 15 : The molar heat capacity of Al is 24.4 J/mol/ o C oC. How much heat energy is required to heat 100 g of Al from 20 o C oC to 80 o C oC? (Al = 27) 5422 J 813000 J 146000 J 30000 J Question 16 : A process taking place at constant pressure is termed – Adiabatic Isothermal Isobaric Isochoric
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