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This question is referring to the size of molecule and its relation to boiling point. The boiling point is higher when the intermolecular interactions are weaker. Intermolecular interactions are weaker in...

Electronegativity decreases from fluorine to astatine in group 17. This is because fluorine has the smallest number of electron shells in the group, which means there is less of a shielding effect than th...

Cl is very electronegative, which makes it electron withdrawing. This means the three Cl substituents pull electrons from the O-H bond. This causes further polarisation of the O-H bond, which means there ...

First, make sure everything is in the correct units: H = 155 kJ mol-1 = 155000 J mol-1 S = 131 J mol-1 T = 25 C = 298K Then use the Gibbs equation to calculate the free energy: G = H - TS G = 155000-298*1...

Group 1 metals all have one outer electron, which is responisble for their properties. As you go down the group:

• the metals become more reactive. This is due to the increased number of electr...