Iron ore is reduced to pure iron by smelting, during which the iron (iii) oxide in the ore reacts with carbon monoxide gas, like this: fe2o3s + 3cog → 2fes + 3co2g suppose an engineer decides to study the rate of this reaction. she prepares four reaction vessels with 158.8g of solid iron (iii) oxide and 33.9g of carbon monoxide gas each. the volume and temperature of each vessel is shown in the table below. arrange the reaction vessels in decreasing order of initial rate of reaction. in other words, select a "1" next to the vessel in which the engineer can reasonably expect the initial rate of reaction to be highest, a "2" next to the vessel in which the initial rate of reaction would be next highest, and so on. rate of reaction a 2.0l 1100.°c b 2.0l 1200.°c c 4.0l 1100.°c d 4.0l 1000.°c

1 b

2 a

3 c

4 d

Explanation:

The reaction rate will be negative. As can seen from the temperature profile, the temperature keeps on increasing. This gives a negative enthalpy of reaction. Thus, = negative.

c. 75.7

i think that is the right

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.