After returning home from the grocery store, you mistakenly left a sealed mug of water (mass of H2O = 512g) on top of your car. When you got in your car the next day, the water was frozen and the mug had cracked. Answer the questions below using the following information: * melting point of water at 1.00 atm = 0.00°C * Cwater, liquid = 75.4 J/mol·°C

* DH°fus = 6.02 kJ/mol * Cwater, solid = 37.6 J/mol·°C

a. If the water in the mug was initially 25.5°C (approx. room temperature) and cooled to -30.0°C, draw a heating/cooling curve for this scenario (assume a pressure of 1.00 atm). Label your x- and y-axes, as well as the different sections of the curve (describe the physical state of water at these sections).

b. Calculate the energy change (in kJ) when the water cooled from 25.5°C to -30.0°C

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.