In an endothermic physical or chemical change,.

a)the potential energy of the system increases
b)all of these
c)the system absorbs heat from its surroundings
d)kinetic energy is converted into potential energy and seems to disappear

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma

How many atoms are in 2 moles of phosphorus?