求英语帝海外党回答化学问题1.A 445gof iron is removed from an oven and plu

求英语帝海外党回答化学问题
1.A 445gof iron is removed from an oven and plunged into 378g
of water in an insulated container. The temperature of the water
increases from 26.0oC to 87.0oC. If the specific heat of iron is
0.449 J g-1oC-1, what must have been the original temperature of the iron, in oC? (The specific heat of water is 4.184 J g-1oC-1.)
2.A 0.008006mol sample of an organic compound was burned in oxygen in a
bomb calorimeter. The temperature of the calorimeter increased from 26.5oC to 34.4oC. If the heat capacity of the calorimeter is
4.24 kJ (oC)-1, then what is the constant volume heat of combustion of this compound, in kilojoules per mole?
3.The standard enthalpy of combustion of C5H12O(l) is -3,331 kJ mol-1 at 298 K. What is the standard enthalpy of formation of C5H12O(l) at 298 K? (已知the standard enthalpies of formation of CO2(g) and H2O(l) are -394 and -286 kJ mol-1, respectively, at 298 K.)
4.如何判定一个粒子is/are diamagnetic in the ground electronic state?