What is heat vaporization?
a)it is the heat required to change a substance’s temp by 1degreec.
b)it is the heat required to change a gram of substance from a solid to a liquid.
c)it is the heat required to change a substance from a solid directly to a gas.
d)it is the heat required to change a gram of substance from a liquid to a gas.
e)it is the heat required to separate one substance into two substances.

Hi!!

CORRECT ANSWER = D

Heat vaporization is

D- It's the heat required to change a gram of substance from a liquid to a gas

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2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !