A scientist draws a phase change diagram for table salt. What information can he obtain from his phase change diagram?

Question

Select all that apply.

Responses

the mass of a sample of table saltthe mass of a sample of table salt

the dissolution of table salt when mixed with waterthe dissolution of table salt when mixed with water

how much energy it takes to melt table salthow much energy it takes to melt table salt

the temperature at which table salt meltsthe temperature at which table salt melts

Answer 1

From a phase change diagram for table salt, the scientist can obtain the following information:

1. How much energy it takes to melt table salt - Phase change diagrams typically include information about the enthalpy (heat) changes associated with phase transitions, such as melting.

2. The temperature at which table salt melts - Phase change diagrams will show the melting point of the substance, which is where the solid and liquid phases are in equilibrium.

The other options (the mass of a sample of table salt and the dissolution of table salt when mixed with water) are not typically represented in a phase change diagram.

So, the correct responses are:

• How much energy it takes to melt table salt
• The temperature at which table salt melts