Because their is no motion in them their for they can not do anything but just sit their I hope I helped u if not I’m so so sorry
The hotter an object is, the faster the motion of the molecules inside it. Thus, the heat of an object is the total energy of all the molecular motion inside that object. Temperature, on the other hand, is a measure of the average heat or thermal energy of the molecules in a substance.
Answer: a gas
The gas phase is the phase where particles are packed the least tightly together.
1680kJ
Heat 500 g ice from -20 to 0 deg C:
500 g x 2.03 j/g C x 20 deg = 20300 J = 20.3 kJ (20 kJ)
Convert 500 g ice at 0 deg to 500 g water at 0 deg:
500 g / 18.015 g/mol = 27.75 mol
27.75 mol x 6.02 kJ/mol = 167.0 kJ (167 kJ)
Heat 500 g water from 0 deg to 100 deg C:
500 g x 4.2 J/g C x 100 deg = 210000 J = 210 kJ (210 kJ)
Convert 500 g water at 100 deg to 500 g steam at 100 deg C:
27.75 mol x 40.7 kJ/mol = 1129.4 kJ (1130 kJ)
Heat 500 g steam from 100 deg to 250 deg C:
500 g x 2.0 J/g C x 150 deg = 50000 J = 50 kJ (50 kJ)
Add all the steps:
20 + 167 + 210 + 1130 + 50 = 1577 kJ (1580 kJ to 3 sig. figures)
Are you certain the book says 1680 and not 1580 kJ?
EDIT: Math error in heating steam; should be 150 kJ not 50 kJ
ANSWER: 20 + 167 + 210 + 1130 +150 = 1677 kJ
Using 3 significant figures, the answer is 1680 kJ