Question

Dry ice is frozen carbon dioxide. If you have 1.4kg of dry ice, what volume will it occupy if you heat it enough to turn it into a gas at a temperature of 20 degrees Celsius? (answer is in m^3)

Answer 1

PV=nRT

n=number of moles=1400/44

R is universal gas constant
T=20+273
P=101.3kpa
solve for V

Answer 2

0.55 cubic meters

Answer 3

A child applies a force F? parallel to the x -axis to a 10.0-kg sled moving on the frozen surface of a small pond. As the child controls the speed of the sled, the x -component of the force she applies varies with the x -coordinate of the sled as shown in the figure (Figure 1) Part A Calculate the work done by the force F? when the sled moves from x=0 to x=8.0m. Express your answer using two significant figures. Part B Calculate the work done by the force F? when the sled moves from x=8.0m to x =12.0m. Express your answer using two significant figures. Part C Calculate the work done by the force F? when the sled moves from x=0 to x =12.0m. . Express your answer using two significant figures.