Energy Changes

[leo]

Hello, I need help with this question. Does anyone know how to solve this? I would prefer an explanation too. :confused: Thanks in advance! :)

Qtn: Which one of the following can occur with the absorption of light energy? (choose one)

1) reaction between hydrogen and chlorine
2) reaction between nitrogen and hydrogen
3) reaction between potassium and water
4) combustion of sodium in chlorine
5) combustion of methane


Qtn: Which material cannot be used as an energy source for a power station? (choose one)

Options:
1) coal
2) oil
3) natural gas
4) uranium
5) nitrogen

Qtn: Which words are needed to complete the statement below?

__1__ is a __2__ fuel which releases __3__ energy when it burns.

1, 2, 3
a) a battery ,portable ,electrical
b) coal ,fossil ,electrical
c) natural gas ,fossil ,heat
d) oil ,nuclear ,heat
e) uranium, nuclear ,electrical

[Sonic]

Hello, I need help with this question. Does anyone know how to solve this? I would prefer an explanation too. :confused: Thanks in advance! :)

Qtn: Which one of the following can occur with the absorption of light energy? (choose one)

1) reaction between hydrogen and chlorine
2) reaction between nitrogen and hydrogen
3) reaction between potassium and water
4) combustion of sodium in chlorine
5) combustion of methane


Qtn: Which material cannot be used as an energy source for a power station? (choose one)

Options:
1) coal
2) oil
3) natural gas
4) uranium
5) nitrogen

Qtn: Which words are needed to complete the statement below?

__1__ is a __2__ fuel which releases __3__ energy when it burns.

1, 2, 3
a) a battery ,portable ,electrical
b) coal ,fossil ,electrical
c) natural gas ,fossil ,heat
d) oil ,nuclear ,heat
e) uranium, nuclear ,electrical

Question 1:

Think of which one's would be false. 3, 4 and 5 can all happen in without extra sources so it must be 1 or 2. Number 2 is the Haber Process which does not involve irradiated light so it would follow that number 1 is the answer although number 4 may also be true.

Question 2:

Which one of those does not react or decay at room temperature ;)

Question 3:

a and c are both correct

[Russ]

Question 3:

a and c are both correct

I would disagree with the definition of a battery as a "portable fuel".

[Sodapop]

Question 1:

Think of which one's would be false. 3, 4 and 5 can all happen in without extra sources so it must be 1 or 2. Number 2 is the Haber Process which does not involve irradiated light so it would follow that number 1 is the answer although number 4 may also be true.

Question 2:

Which one of those does not react or decay at room temperature ;)

Question 3:

a and c are both correctI would also disagree with the a) for Question 3

I would qualify a battery as a "pump" for electrons more than an actual provider of energy. The term "release" in the question brings that confusion in my mind.

[leo]

Thank you all(: