If 0.45kg of iron at 140C is added to 1.5kg of water at 22C What will be the final temperature of the system?

13.

1. Two moles of helium gas are placed in a cylindrical container with a piston. The gas is at room temperature 27 °C and under a pressure of 3.3.105 Pa. When the pressure from the outside is decreased, while keeping the temperature the same as the room temperature, the volume of the gas doubles. Use that the gas constant R = 8.31 J/(mol K). Think: What kind of process is this? Isobaric, isothermal, adiabatic, isochoric or non-quasi-static? (a) Find the work the external agent does on the gas in the process. W = ext. agent (b) Find the heat exchanged by the gas and indicate whether the gas takes in or gives up heat. Assume ideal gas behavior. Q= ✓J Q is realeased by gas Q is absorbed by the gas

22. CD A tank contains 0.85 mol of molecular nitrogen (N,). Determine the mass (in grams) of nitrogen that must be removed from the tank in order to lower the pressure from 38 to 25 atm. Assume that the volume and temperature of the nitrogen in the tank do not change.

1. If two thermometers, one reading oc and the other K, are inserted in the same system, under what circumstance will they both have the same numerical reading? What will be the system's temperature when the absolute thermometer reads twice the numerical reading of the Celsius thermometer?

1. Two monoatomic ideal gases A and B are at the same temperature. If 2 g of gas A has the same internal energy as 0.2 g of gas B. (a) Calculate the ratio of the number of moles of each gas. nA nв (b) Calculate the ratio of the atomic masses of the two gases. MA MB =

15. The adiabatic index of a gas is given by which of the following? a. Cp/Cv b. Cv/Cp C. Cp-Cv d. Cpt Cv O B D OA OC Question 10 C

1. A dilute gas at a pressure of 2.0 atm and a volume of 4.0 L is taken through the following quasi-static steps: (a) an isobaric expansion to a volume of 10.0 L, (b) an isochoric change to a pressure of 0.50 atm, (c) an isobaric compression to a volume of 4.0 L, and (d) an isochoric change to a pressure of 2.0 atm. Show these steps on a PV diagram drawn in your notebook and determine from your graph the net work done, Wgas by the gas. Use 1 atm~105 Pa and 1L = 10-3 m³. W gas

C=3.0*10°ms", m,=1.673*10"Kg, mn=1.675*102"Kg, Re=1.097*10'm, K=9*10°Nm°c?, F=9.6485309*10°Cmol', mol", la.m.u.=1.660569*10²" kg. ao=5.29*10'"m e=1.6*101°c, Eo=8.8*10-12Asvm², m,=9.1*103"Kg, h=6.62*10*Js, h/2T=1.05*10Js, NA=6.022045*10²3 -27 1-Find the atomic mass of the following elements CI, O and Pb; if M(CI)=35.45g, M(0)=16.00g and M(Pb)=207.20g? М(celement) m, atom N. 2-Find the radius of the nuclei of the following elements 1"1, 13Cs and 238U? "'muet = (1.3)A/3 *10-1$ m