From ede10d6a676e25f234035756afd5e2e682afb5e9 Mon Sep 17 00:00:00 2001 From: eggy Date: Tue, 12 Jan 2021 12:20:31 -0500 Subject: [PATCH] phys: clarify changing state --- docs/sph3u7.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/sph3u7.md b/docs/sph3u7.md index 1f072ff..a902328 100644 --- a/docs/sph3u7.md +++ b/docs/sph3u7.md @@ -560,7 +560,7 @@ $$\frac{1}{2}m\overline{v^2}=\frac{3}{2}k_BT$$ The **internal energy** of a substance is the sum of the kinetic energy of the particles (temperature) and the potential energy of the particles due to their changing attractive/repulsive forces. The potential energy of an object is highly dependent on its state. A more solid state results in lesser potential energy as the particle and closer and have weaker intermolecular forces. !!! note - This is why when boiling water at 100°C, its temperature does not change until all of it has changed state to a gas as the thermal energy is used to increase the potential energy of the object instead of its temperature. + When changing state, the temperature of a substance does not change as the energy is used to break the attractive intermolecular forces instead of increasing kinetic energy. In otder to change state, the particles must have enough energy to overcome the intermolecular forces holding them together. ### Specific heat capacity