Question

Does Melting Point increase with Pressure?

Answer 1

Hint:Melting point is defined as the temperature at which the substance changes its physical form from solid to liquid. Melting point not only depends on the pressure of the material but it also depends on the temperature and the impurities present in the material. This is the reason that ice formation takes place differently on different altitudes, because at different altitudes we have different pressure.

Complete answer:
Since it is not specified what substance the melting point is asked for so for general discussion, we will assume that here we are talking about ice (solid form of water). So, in case of water the melting point reduces as the increase in temperature, the reason for that is when we increase the pressure the molecules of water or ice feel more force of attraction because the increase in pressure makes them closer to each other and hence the resistance in between them increases. The increase in resistance increases the temperature and hence which reduces the melting point. Melting points vary with the impurities in material too. So, when we talk about the melting point of water then we generally assume that the water is pure and no impurities are added to it.

Note:
To understand the concept that the melting point of ice decreases with increase in temperature we can take a real-life example of skating or surfing on ice, when we start to surf on ice, we apply pressure on it due to which the melting point of ice or water gets decreased and it start to melt which reduces the friction between ice and our surfboard and we can enjoy this ice sport.