Known: ① C3H8 (g) = C3H6 (g)+H2 (g) △ H =124.2kJ? mol- 1，②H2(g)+ 12o 2(g)= H2O(l)△H =-285.8 kj？ mol- 1，③C3H8(g)+5O2(g)=3CO2(g)+4H2O(l)，△H=-222 1.5kJ？ Mol- 1, according to this law, the reaction
Then, when 1molC3H6 is completely combusted to generate CO2 and liquid water, the heat released is 2C3H6(g)+9O2(g)=6CO2(g)+6H2O(l), which can be obtained from ③×2-②×2-①×2, that is, h = (-124.2). mol- 1)×2+(-222 1.5 kj？ mol- 1)×2(-285.8kJ？ Mol-1) × 2 =-4119.8kj/mol, then1? The heat released by CO2 and liquid water produced by the complete combustion of molC3H6 is 2059.9kJ, so the answers are: C3H8(g)+5O2(g)=3CO2(g)+4H2O(l), △H=-222 1.5kJ? mol- 1； 2059.9;
(2) (1) In the primary battery formed by aluminum as the negative electrode, platinum mesh as the positive electrode and seawater as the electrolyte solution,
A. When the primary battery is working, the current flows from the negative electrode to the positive electrode along the lead, that is, the current flows from the platinum electrode to the aluminum electrode along the lead, so A is wrong;
B. The platinum electrode with mesh can increase the area of gas, and the mesh is more conducive to the discharge of O2 than the block, so b is correct;
C. When the primary battery is working, the anion in the electrolyte moves to the negative electrode, so the OH- in seawater moves to the aluminum electrode, so C is correct;
So the answer is: BC;
② The ionic equation of electrolytic sodium chloride solution reaction is 2Cl-+2H2O? Turn it on? . ? 2OH-+H2↑+Cl2↑, according to the total reaction, when * * * collects 0.448L, that is, 0.02 mol, the generated chlorine and hydrogen are both 0.0 1mol, so the amount of substances generating sodium hydroxide is 0.02mol, so the concentration of sodium hydroxide is C = NV = 0.02mol = 0.65438+. Turn it on? . ? 2OH-+H2 ↑+ Cl2↑； 13.