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23 Nov 2019
9.) 300 g of boiling water is poured into a 420-g silverbowlat T = 20 0C. Find the final temperature atthermalequilibrium. (Neglect the loss of heat, andCsilver =230 J kg-1 K-1 , andCwater = 4190J kg-1 K-1 .)
10.) The ideal gas in a cylinder is initially at point A, wherethepressure is 1.6 x 105 Pa and the volume is 30 L. Thegasis taken through the following processes: 1) isochoric cooling from A to B (pressure 6 x 104Pa)with 450 J heat released;
2) isobaric expansion from B to C (volume 45 L) with 1800Jabsorbed . Sketch the processes on a pV-diagram, and find a)thework done by the gas in the two processes; b) the changes ofitsinternal energy in these two processes.
9.) 300 g of boiling water is poured into a 420-g silverbowlat T = 20 0C. Find the final temperature atthermalequilibrium. (Neglect the loss of heat, andCsilver =230 J kg-1 K-1 , andCwater = 4190J kg-1 K-1 .)
10.) The ideal gas in a cylinder is initially at point A, wherethepressure is 1.6 x 105 Pa and the volume is 30 L. Thegasis taken through the following processes:
1) isochoric cooling from A to B (pressure 6 x 104Pa)with 450 J heat released;
2) isobaric expansion from B to C (volume 45 L) with 1800Jabsorbed . Sketch the processes on a pV-diagram, and find a)thework done by the gas in the two processes; b) the changes ofitsinternal energy in these two processes.
