Enthalpy of reaction: -41.15 kJ
Entropy change: -42.36 kJ
The energy increases because the molecules in water move faster
A because you can prove that with the graph you are given in the wuestion
Hey there !
a) Pb(SO4)2 => <span> lead(II) sulfate
b) </span><span>The molar mass of this compound was calculated from the amount of atoms of each element, with its respective atomic masses
Pb = 207.2 a.m.u
S = 32.065 a.m.u
O = </span><span>15.9994 a.m.u
Therefore:
</span>Pb(SO4)2 = 207.2 + 32.065 * 2 + 15.9994 * 8 => <span>399.3252 g/mol
</span>
hope this helps!
They're about the same, but a neutron has slightly more mass.