Do all substances have the same melting point and boiling point as water?
(Consider using the particle theory to answer this question.)
Answer (3)
They cannot, because then at room temperature metals would not be solid. THey would be in a liquid state.
Each substance has its own unique melting and boiling points determined by its intermolecular forces. Water's melting and boiling points are not universal; they are specific to water due to its molecular characteristics and are altered by changes in pressure.
No, not all substances have the same melting point and boiling point as water. Each substance has its own unique melting point and boiling point which are determined by the specific intermolecular forces and their respective strengths within the substance. The melting point is the temperature at which a solid turns into a liquid, and this happens when the particles of the solid gain enough energy to overcome the attractive forces that hold them together in a solid structure. Similarly, the boiling point is the temperature at which a liquid turns into a gas, a transition that requires enough energy for the particles to separate completely from one another.
The phase a substance is in at any given temperature and pressure depends on the balance between the kinetic energy of its particles and the strength of the intermolecular forces between them. When energy (in the form of heat) is added to a substance, its particles gain kinetic energy. If the kinetic energy is sufficient to overcome intermolecular forces, a phase change can occur. For example, water has its melting point at 0°C and boiling point at 100°C under standard atmospheric pressure (1 atm). These points change with pressure; for instance, at higher pressures, boiling and melting points increase.
Phase diagrams can help us visualize the relationships between pressure, temperature, and the state of matter for any given substance. Understanding these diagrams and the underlying factors such as intermolecular forces is key to knowing why substances have different melting and boiling points.
Different substances have unique melting and boiling points determined by their molecular structures and intermolecular forces. Water's melting point is 0°C, and its boiling point is 100°C, but other substances vary greatly, such as methane and ammonia. These points can also change with pressure, influencing the states of matter.
;
