Question

question 5
during a phase change, why does the temperature stay the same even while heat is being added?
answer in at least 1 complete sentence.

question 6
you look at a heating curve and see a flat line where the temperature stays the same. heat is still being added. w phase changes could be happening, and why?

Explanation:

During a phase change, the added heat energy is used to break intermolecular forces (like hydrogen bonds in water) rather than increasing the kinetic energy of molecules (which would raise temperature). For example, when ice melts, heat breaks the rigid lattice of ice (solid - water) into the more disordered liquid state.

Answer:

During a phase change, the temperature remains constant while heat is added because the heat energy is utilized to overcome intermolecular forces and change the state of the substance, not to increase the average kinetic energy (and thus temperature) of the molecules.