Choose ALL TRUE statements below 1) Heat of fusion is the amount of energy it ta
ID: 550347 • Letter: C
Question
Choose ALL TRUE statements below 1) Heat of fusion is the amount of energy it takes to raise the temperature of ig by 1 degree Celsius. 2) Non-polar substances have a higher heat of vaporization than polar substances 3) During changes of state, intermolecular forces are broken 4) During vaporization the temperature remains constant 5) Heat of vaporization is the amount of energy it takes to change a liquid to a gas at the boiling temperature. 6) specific heat is the amount of energy it takes to change a solid to liquid at the melting temperature.Explanation / Answer
Endothermic = the process,which absorbs heat energy.
ex: 1. melting, 3 . vaporization
q.3
heat required(q) = n*DHfus
= 1.33/18*6.01
= 0.44 kj
= 0.105 kcal
= 105 cal
q.4
heat required(q) = m*s*DT
= 2.5*1*(65.5-15.5)
= 125 cal
q.5
heat required(q) = n*DHvap
= (0.455/18)*9.73
= 0.246 kcal
= 246 cal
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