How much heat is lost when 12.55 g of zinc vapor at 907 degrees celsius is cooled to 425 degrees celsius?
3 answers
What's the freezing point and boiling point of Zn? You need those to work the problem.
boiling point- 907 degrees celsius
melting point- 419 degrees celsius
melting point- 419 degrees celsius
At 407 the Zn metal vapor is at the boiling point. First it must be condensed (at 407C) to become a liquid. Cooled to 425 it hasn't frozen yet so it is still a liquid.
q1 = heat released on condensing the Zn vapor.
q1 = mass Zn vapor x heat vaporization/condensation.
q2 = heat released on cooling to 425 C.
q2 = mass Zn x specific heat Zn LIQUID X (Tfinal-Tinitial)
Total heat released is q1 + q2. I don't know the specific heat of Zn metal liquid.
q1 = heat released on condensing the Zn vapor.
q1 = mass Zn vapor x heat vaporization/condensation.
q2 = heat released on cooling to 425 C.
q2 = mass Zn x specific heat Zn LIQUID X (Tfinal-Tinitial)
Total heat released is q1 + q2. I don't know the specific heat of Zn metal liquid.