Compare the description of the kitchen in lines 7-10 to lines 231-239. What do these differing descriptions illustrate?

I believe that the lines in question are the lines about the kitchen making eggs and toast. When this scene first happens, the overall mood is quite tranquil and easy going. There isn't a sense of hurry or worry about it at all. It sounds like a very pleasant morning with the house calmly making the correct amount of eggs and toast. The kitchen makes a hissing "sigh" as it works to make "perfectly browned toast" and "cool" milk.
At the story's conclusion, the mood in the kitchen is quite different. The kitchen is in panic mode. It's frantically trying to get stuff done, and the kitchen is making all kinds of mistakes. It's making 10 dozen eggs and 8 loaves of toast. It is "hysterically" hissing and making the meal at a "psychopathic" rate. These two descriptions help further illustrate how the house has fallen apart. It has been broken physically, but the house has also been broken "mentally." It can't physically do its job correctly, but even if it could, the house is no longer thinking and feeling correctly. It's been broken on all levels.