Identify each category of substance as soluble or insoluble in water. Salts of Group 1 elements Soluble Most halide (Br-, Cl-, and I-) salts Soluble Most nitrate salts Soluble Most silver salts Soluble Most carbonate and phosphate salts InsolubleSuppose you are studying an unknown solution based on its precipitation reactions with other solutions, resulting in this data table. Na2SO4 NaCl Na2CO3 Unknown Precipitate Precipitate No reaction Which compounds might be your unknown? Select one or more: A. Ba(NO3)2 B. NaNO3 C. AgNO3 D. Ca(NO3)2 E. Pb(NO3)2 F. Sr(NO 3)2

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false