What doe the elements in these groups have in common? a)alkali metals b) halogens c) noble gases

When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)

The boiling point of liquids is very high what does it indicate

What are the similarities of physical and chemical change ?