Question

An aquanaut lives in an underwater apartment 100 m beneath the surface of the ocean. Compare the freezing and boiling points of water in the aquanaut’s apartment to their values at the surface. Are they higher, lower, or the same? Explain.

Short answer

The melting point of water is low and boiling point of water is high at a surface.

Step-by-step solution

Definition of  thermodynamic theory  

As per the basis of the thermodynamic theory, a system always adjust itself due to its changes by pressure.

Based on this statement, by increasing the pressure level of water decrease its volume. Due to this reason, water takes a small surface at its liquid phase than in solid phase. Thus, the melting point is low.

Step: Fact of thermodynamic theory  

At a 100 m depth point, if the absolute pressures increases then the depth of water is also increasing. Due to this reason n, the melting point is low at the deep surface. besides, increasing absolute pressures also increase the boiling point of water. This is the explanation of the ice water.