Statement I: The basic of Laplace correction was that, exchange of heat between the region of compression and rarefaction in air is not possible.
Statement II: Air is a bad conductor of heat and velocity of sound in air is large
According to Laplace, the changes in pressure and volume of a gas, when sound waves propagated through it, are not isothermal, but adiabatic. A gas is a bad conductor of heat. It does not allow the free exchange of heat between compressed layer, rarefied layer and surrounding.