How exactly do u get the q,w, and dH for question 30

-- Anonymous, March 02, 2000

Answers

q = nCpdT(-30to0) + n*dHfusion + nCpdT(0to100) + n*dHvapor + nCpdT(100to140)

q = dH at constant pressure

V at 100C = (nRT)/P; V at 140C = (nRT)/P

Vwater= m * density(1g/mol)

work is only done when vaporization occurs and when vapor expands under increasing temp.

w= -PdV(water to gas) - PdV(gas100c to 140C)

-- Anonymous, March 02, 2000