Hydrogen gas p1=15 psia, t1= 80 degree f. compressed at a rate of 20 ft3/min in a hot environment until p2= 75.3 psig. heat is introduced at a rate of 20 btu/min and the change in entropy is 0.268 btu/min-r.

t1= 540r, h1= 3660.9, u1=2588.5, sp. heat = 31.232

(a) what is final t in r?

(b) what is the work equivalent hp if the system is non flow?

(c) work if the system is steady flow in btu/min?

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring

What is the most important factor in determining climates.