The same amount of heat is removed from 2kg of water and from 1kg of water starting at the same temperature. What happen?

The temperature of the 1kg will boil faster than the 2kg.

Because of the Specific Heat capacity.

The temperature of the 1 kg water will be lower.

Q=mcΔt

Q1 = 1kg*c*Δt (1)

Q2 = 2kg*c*Δt (2)

Q1=Q2

1kg*c*Δt (1) = 2kg*c*Δt (2)

Δt (1) = 2Δt (2)

We can see that change in temperature for 1 kg will be 2 times more that change in temperature for 2 kg of water.