1LB of ice at 20 deg f exerts its force downward. after the ice has absorbed 200 BTU's what direction will the force be exerted?

After absorbing 2000 BTU's what direction will the force be exerted?

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huojjoj

force would be outward and downward because 1 pound of ice melts at 144 btus

after 2000 btus the 1 pound of ice would exert force evenly in all directions because its a vapor

To determine the direction in which the force will be exerted, we need to understand the phase changes of water and how they affect the direction of force.

1. When the ice is at 20°F, it is in a solid phase. The force it exerts is downward due to its weight.

2. As the ice absorbs heat energy, it undergoes a phase change from solid to liquid. This phase change is known as melting, and it happens at 32°F. During melting, the ice starts to transform into water while maintaining the same temperature until all the ice has converted to liquid.

3. After absorbing 200 BTU's, the ice reaches the melting point at 32°F. At this point, the force is still exerted downward since some ice might still be solid. However, the magnitude of the force might start to decrease as the solid ice melts into liquid water.

4. After absorbing 2000 BTU's, the ice would have experienced a significant amount of heating. By absorbing this much heat, all the ice would have melted, and at this stage, the force exerted would be upward. The liquid water would be expanding and transforming into steam due to further heating. This phase change from liquid to gas (steam) is known as vaporization.

In summary, after absorbing 200 BTU's, the force exerted by the ice would still be downward, but it may decrease in magnitude due to partial melting. After absorbing 2000 BTU's, the force would be upward as all the ice would have converted into steam.