Answer:
Explanation:
a )
From the graph given , energy of reactant = 0
b )
energy of product = -15 kJ
c )
ΔH = energy of product - energy of reactant
= -15 - 0 = - 15 kJ
ΔH is negative so reaction is exothermic .
d ) Activation energy = 25 - 0 = 25 kJ .
e ) Energy released = 15 kJ .
Answer:
A cation.
Explanation:
When an electron is liberated, that means it is removed from the atom.
When an electron is lost, the atom is ionized, and becomes a cation.
It becomes a cation because it loses one negative charge, and therefore become positively charged.
Raising of the boiling point is a colligative property. That means that it depends on the number of particles dissolved. The greater the number of particles the greater the increase in the boiling point. So, you can compare the effect of these solutes in the increase of the boiling point by writing the chemical equations and comparing the number of particles dissolved: 1)ionic lithium chloride, LiCl(s) --> Li(+) + Cl (-) => 2 ions; 2) ionic sodium chloride, NaCl(s) --> Na(+) + Cl(-) => 2 ions; 3) molecular sucrose, C12H22O11 (s) ---> C12H22O11(aq) => 1 molecule; 4) ionic phosphate, Na3PO4 --> 3Na(+) + PO4 (3-) => 4 ions; 5) ionic magnesium bromide, MgBr2 --> Mg(2+) + 2 Br(-) => 3 ions. <span>So, ionic phosphate produces the greatest number of particles and it will cause the greatest increase of the boiling point.</span><span />
CO2 will be the first to boil because it will be the first to warm up because it is the closest temperature to 0
