This is going to be a <em>phase </em>change!
Answer:
True
Explanation: Imagine the Electrons is by the nucleus which give more energy.
Answer:
554.86kj
Explanation: Since 1 mole of CaC2=15.14kj yield 1mole of C2H2
The enthalpy change of H2O is 2*285=570
570+-15.14=554.86kj
Hence Hp is 554.86kj
He=Hp
There is no chemical formula for light energy because light is not a chemical.
