Tiguan moved a solid and a liquid together in a beaker. he
determined that a chemical change occurred,
if his conclusion is correct, which substances could he have
been observing and why?
ice mixed into warm ol, because the change of state that
occurred when the ice melted cannot be reversed
baking soda mixed into vinegar, because the production of
bubbles indicates that a new substance formed
sugar moved into hot water, because the disappearance of
solid indicates that the chemical identity of the sugar
changed
sand mixed into water, because when sand was added
the mass of the beaker increased
subs

“Baking soda mixed into vinegar, because the production of bubbles indicates that a new substance was formed.” This is the chemical change Tiguan observed.

Option B

Explanation:

In the given options, if Tiguan has mixed ice with oil, sugar dissolving in water and sand mixing with water, it is a physical change as the composition of the both the solid and liquid reactants will remain same.

The mixing of baking soda with vinegar leading to release of bubbles is the chemical change. Its state is completely different and also it did not inherit any properties from baking soda and vinegar.

So, the formation of new compound with different properties is termed as occurrence of chemical change between reactants. Thus, Tiguan has considered solid as baking soda and liquid sample as vinegar and observed the chemical change of formation of bubbles.

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat