Find the increase in entropy of 3.43 kg of liquid oxygen that starts at its boiling temperature, boils, and warms to 24.0°c at constant pressure. the specific heat of oxygen gas at constant pressure is 913 j/(kg · °c), heat of vaporization is 213 kj/kg, and its boiling point is −183.0°c.

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.