FNTs 5 and 6 emphasized the significance of the beginning and end of the interval. This FNT asks you to determine the interval (specifically the final state) using Energy-Interaction Model, given the amount of heat transferred to the system. 7) Now, imagine you are gradually adding heat to a 500g block of ice initially at -25°C. You can ignore the pot's thermal energy and assume all input energy is perfectly transferred to the H2O. One question that could be asked is, What is the final state of the water (phase and temperature) after the addition of 252 kJ of heat?" a) Explain why, based only on the given information and without further analysis/calculation, it is not possible to construct a single energy-system diagram that could be used to determine the final state of the water. (Hint: try to construct such a diagram. Explain why you can't.) In cases like this, you must first use the model to analyze a shorter interval. Can you construct an energy system diagram that could be used to determine how much energy is needed to increase the temperature of the ice from -25°C to 0°C? How does this energy compare to 252 kJ? Now explain how to proceed using the Energy-Interaction Model to find the final state of the H2O, when 252 kJ are added.

Dinate system, and a charge q = - 2.00 nc is placed s2 10 n> c. (a) what is the change in electric potential energy when the dipole moment of a molecule changes its orientation with respect to es from parallel to perpendicular? (b) at what absolute temperature t is the average translational kinetic energy 32 kt of a molecule equal to the change in potential energy calculated in part(: abovethistemperature, thermalagitationprevents the dipoles from aligning with the electric field.) placed in a uniform electric field e with magnitude 1.6 * 6 on the positive x-axis at x = 4.00 cm. (a) if a third charge q3 = +6.00 nc is now placed at the point x = 4.00 cm, y = 3.00 cm, find the x- and y-components of the total force exerted on this charge by the other two. (b) find the magnitude and direction of figure p21.62 ll uu 21.55 . torque on a dipole. an electric dipole with dipole moment ps is in a uniform external electric field es. (a) find the orientations of the dipole for which the torque on the dipole is zero. (b) which of the orientations in part (a) is stable, and which is unstable? (hint: consider a small rotation away from the equi- librium position and see what happens.) (c) show that for the stable orientation in part (b), the dipole’s own electric field tends to oppose the external field. 21.62 ..