Question

is conversion of magnetite to hematite by oxygen an endothermic process
3Fe+2O2----->Fe3O4
2Fe+3\2O2------>Fe2O3
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Answer 1

Answer:

SECTION I

(Reading Comprehension)

(Q. No. 1-10) Read the following passage from the lesson “Homework”.

Homework has historically been given to students to reinforce what they

learn at school, and ultimately to help them learn the material better. However, too

much homework is not helpful, and can be counter-productive. Excessive amounts

of time spent on completing homework can take away the kid’s social life, family

time, and it limits their participation in sports or other activities. The amount of

homework a teacher has to give to a student should be restricted. Critically

acclaimed author, Tamim Ansary reports that since 1981, the amount of homework

given to an average sixth class child has increased by more than fifty per cent. Many

people claim that the increase in homework dates as far back as 1957. The new

competition that emerged served as an incentive for schools to try to increase the

volume of the curriculum. The amount of homework increases with the increase in

class. Many teachers defend large amounts of homework, claiming that it helps to

prepare students for a world that is becoming increasingly competitive. However,

Dr. Kralovec, author of ‘The End of Homework’, argues that doing homework

during high school has little or no effect on successful study skills of the students

when they join college. Excessive amounts of homework can be harmful to kids both

physically and mentally. A lot of homework usually means a lot of books to carry.

Fifty-five percent of the Massachusetts ( an institution in the U.S.A.) children, as per

the survey by researchers of Simmons College, carry loads heavier than fifteen

percent of their body weight, which is the suggested limit. Carrying large amounts

of weight daily at a young age can do a lot of damage because bones are still in

development stage. The U.S. Consumer Product Safety Commission has reported

Explanation:

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Answer 2

Answer:

this conversion of magnetite to hametite is exothermic process

Explanation:

magnetite release more energy than hematite (formation)there fore differnce of energy 293 is released in form of heat ...heat release means exothermic process

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