<span><span>а) C + K2Cr2O7 + H2SO4 -> CO2 + Cr2(SO4)3 + K2SO4+ H2O
3 <span>C0</span></span> + <span>2 <span>K2Cr2VIO7</span></span> + <span>8 <span>H2SO4</span></span> → <span>3 <span>CIVO2</span></span> + <span>2 <span>Cr2III<span>(SO4)</span>3</span></span> + <span>2 <span>K2SO4</span></span> + <span>8 <span>H2O</span></span></span><span>C0</span> - <span>4e-</span> → <span>CIV</span><span>CrVI</span> + <span>3e-</span> → <span>CrIII</span>
W ( омега, т.е. массовая доля)
Mr(CuO) = 64 + 16 = 80
w(Cu) = m(Cu) / m(CuO)
w (Cu) = 64 / 80 = 0,8 = 80%
w (O) = m(O) / m(CuO) = 16 / 80 = 0,2 = 20%
100 л Х кДж
С6Н14 + 9,5О2 = 6СО2 + 7Н2О + 3414,22 кДж
n = 1 моль
Vm = 22,4 л/моль
V = 22,4 л
100 л С6Н14 - Х кДж
22,4 л С6Н14 - 3414,22 кДж
Q = 100 * 3414,22 / 22,4 = 15242 кДж