Blog Week 14

I was absent Monday, Tuesday and Wednesday this week. I reviewed the notes that were done in class and gathered some information. Mathematics of state changes △Hfus, the energy of melting and freezing and △Hvap, the energy of evaporating and condensing and boiling. I also learned what field is, it's the area around an object where a non-contacting force can be exerted. Energy can be stored in fields, electrostatic field are particle in chemistry. Eph is the energy stored in the "field" between particles. Eth is the movement of those particles. I learned that specific heat is the energy associated with one Celsius change in temperature for one gram of a substance. On Thursday, I was in class and we learned about heat of vaporization and fusion. Heat of vaporization, △Hvap, is liquid to gas and gas to liquid. The equation to find the amount of energy for heat of vaporization is Qvap=m△Hvap. It takes 2260J per gram for water. Heat of fusion, △Hfus, is solid to liquid and liquid to solid. The equation is Q=m△Hfus. It takes 334J per gram for water. Both heat of vaporization and fusion are part of phase energy. The thermal energy equation is Q=mc△T. On Friday, we took an assessment and it was pretty hard. I didn't know how to explain most of the questions and I was not prepared well enough. So, I will definitely be reassessing.