Question

If each H2molecule produces2e -how many kilograms of hydrogen would be required to generate the electricity needed for a typical house?

Answer 1

Do you have a stated amount for the average amount of electric a typical house uses? I doubt they'd have asked this without more information.

Answer 2

Also, what is the 'weight' of an electron according to your book/homework?

Answer 3

Ok now the thing is we have got 2e from each hydrogen

Answer 4

@Ishaan: two from each diatomic molecule! Not just atom. Wanted to point that out.

Answer 5

e charge is something about 1.6 x 10^-19 coulombs

Answer 6

Find out how much it takes first. Then use a constant to know how many electrons you need (there is a coulomb amount/mol), then use the stoichometric coefficients (i'm assuming a 2) since:
\[H_2 \rightarrow 2H^+2e^-\]
Then use molar mass of H2 (2.002) to convert to grams from moles

Answer 7

Awesome. Now we need the book's stated mass and the average household usage.

Answer 8

but the thing is it's not current it is the power or voltage needed for electricity

Answer 9

96.485 kJ per volt gram equivalent
Thats for electrons. Its Faraday's constant.

Answer 10

Pumpkin: Could you tell us everything the book provided?

Answer 11

Awesome. So I guess that just leaves us with needing the average electric usage.

Answer 12

Oh! I think I just understood what Ishaan was saying

Answer 13

We're looking for voltage, not kw/h?

Answer 14

lets make it 240 w it in india and in us it is 110

Answer 15

Wouldn't the book most likely be american standard? I'm assuming that it's for an american class, seeing as it's in English.

Answer 16

Now P= i^2 r

r resistance and i current

v = ir
v for voltage

i = v/r

Answer 17

and lets assume we have copper wire for house electric wiring

Answer 18

thats makes p= v^2/r

Answer 19

yeah so american standard p =110 right?

Answer 20

ah we can't solve it this way we need diameter and length of wire too
where did she get this?

Answer 21

220 vs 110. Sounds right to me.

Answer 22

I am not very good with physics, but I'm getting the impression that pumpkin hasn't provided ALL the information that was given. :(

Answer 23

yeah your right