A 0.100 mol sample of propane, a gas used in many homes in these days of load shedding, was placed in a bomb calorimeter with excess oxygen and ignited. The reaction was
C3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (l)
The initial temperature was 25.000 0C and its total heat capacity was 97.1 kJ 0C–1
. The
reaction raised the temperature of the calorimeter to 27.282 0C

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.