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Chapter 21: Q21.137 CP (page 978)

In an electric power plant, personnel monitor theO2 content of boiler feed water to prevent corrosion of the boiler tubes. Why does Fe corrode faster in steam and hot water than in cold water?

Short Answer

Expert verified

The activation energy of the reactants is easier to obtain at higher temperatures, hence Fe corrodes quicker in high-temperature fluids or steam.

Step by step solution

01

Define chemical reaction

Chemical synthesis or, alternatively, chemical breakdown into two or more separate chemicals occurs when one component interacts with another to generate new material. These processes are known as chemical reactions, and they are generally irreversible until followed by other chemical reactions.

02

Explaining why Fe corrodes faster in steam and hot water than in cold water.

Iron metal is exposed to water and gases in boiler tubes, increasing the risk of corrosion. When there is a lot of water, Fe metal corrodes much faster than when there is little water. This is because there is more energy available to the corrosion reactants in hot water to obtain the activation energy required for the process to occur.

Therefore, the reactants have an easier time reaching the activation energy at higher temperatures, Fe corrodes faster in high-temperature fluids or steam.

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Most popular questions from this chapter

Consider the following voltaic cell:

(a) In which direction do electrons flow in the external circuit?

(b) In which half-cell does reduction occur?

(c) In which half-cell do electrons leave the cell?

(d) At which electrode are electrons generated?

(e) Which electrode is positively charged?

(f) Which electrode increases in mass during cell operation?

(g) Suggest a solution for the anode electrolyte.

(h) Suggest a pair of ions for the salt bridge.

(i) For which electrode could you use an inactive material?

(j) In which direction do cations within the salt bridge move to maintain charge neutrality?

(k) Write balanced half-reactions and an overall cell reaction.

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