When water solidifies to ice, then heat is _______.
depending on the condition it may be absorbed or evolved
absorbed
remains constant
evolved
Energy of particles in liquid is more than that in the solid state. So, when water solidifies to ice, then heat is evolved.
When a substance is converted from ___ , the heat evolved or absorbed is known as Heat of transition.
In the presence of a catalyst, the heat evolved or absorbed during the reaction ..... .
(a) increases (b) decreases (c) reamins unchanged (d) may increase or decrease