Entropy is an extensive property. An extensive property is a property that depends on the amount of matter in a sample. An intensive property is a property of matter that depends only on the type of matter in a sample and not on the amount. Colour, temperature and solubility are examples of intensive properties. Entropy, S=Q∕T Here, ' Q ' is heat energy added or removed and ' T ' is absolute temperature of the system. and Q=mCT where, ' m ' is mass of the substance and ' C ' is specific heat of the substance. Here, we can see that, ' Q ' depends on ' m ' (mass) and entropy (S) depends on ' Q ' So, entropy (S) depends on mass (m) and hence is an extensive property.