Physical change is where u change physically or on the "outside" hope this helps, have a great day!
Answer:
(a) The normal freezing point of water (J·K−1·mol−1) is
(b) The normal boiling point of water (J·K−1·mol−1) is
(c) the chemical potential of water supercooled to −5.0°C exceed that of ice at that temperature is 109J/mole
Explanation:
Lets calculate
(a) - General equation -
= =
→ phases
ΔH → enthalpy of transition
T → temperature transition
=
= ( is the enthalpy of fusion of water)
=
(b)
= ( is the enthalpy of vaporization)
=
(c) =
°° = °°ΔT
°°
= 109J/mole
B
a and c are unrelated
d: ph will increase
Phosgene on reacting with <span>phenylmagnesium bromide generates
benzoyl chloride.
Since, </span>phenylmagnesium bromide is added in excess. It would further react with benzoyl chloride to form
benzophenone.
Benzophenone on further reacting with phenylmagnesium bromide, and aqueous treatment, gives
triphenylmethanol.
Entire reaction pathways is shown below:
Answer:
Around 450 B.C.
Explanation:
The idea was forgotten until the 1800 when John Dalton re-introduced the atom.