I need help with these two chemistry problems I'm completely stuck

What are transitions between a liquid and a solid called? identify which way they are transitioning

Ineed to find the answer of this question because i dont understand it

What is the binding energy of a nucleus that has a mass defect of 5.81*10-^29 kg a 5.23*10-^12 j b 3.15* 10^12 j c 1.57*10-3 j d 9.44*10^20 j