a) The one with the higher capacity will have smaller change in temperature
b) Yes, because the total energy is saved (enclosed) inside.
c) Heat from hot iron heats the water, then if there is still enough heat, the water can boil and evaporate
d) Q2+Q1=0, Q1 is for Iron and Q2 is for water
-C1M1(t-T1)=C2M2(t-T2)
C.
e) Closed system (isolated system) because the energy is transferred only between water and iron.
f) It would be smaller.