Question

1. Freezing of water - endothermic or exothermic reaction?
2. Melting of water - endothermic or exothermic
3. Photosynthesis - endothermic or exothermic
4. Balance this chemical equation:
___ C2H4O2 + ___ O2 ___ CO2 + ___ H2O

Answer 1

@ParthKohli

Answer 2

@Qwertty123

Answer 3

@ijlal I only need the last one

Answer 4

Oh, hey qwertty.

Answer 5

Hey ^.^
Which one you need help with?

Answer 6

4 now. just the chemical equation.

Answer 7

@Qwertty123 , still there?

Answer 8

Balance by inspection. There are 2 C on the left and one on the right - start by putting a 2 on the right (hint, leave H and O until last)

C2H4 + O2===> 2 CO2 + H2O

Next balance H - 4 of left, 2 on right so

C2H4 + O2 ===> 2 CO2 + 2 H2O

Now balance O if needed

2 on left - 6 on right, so

C2H4 + 3O2 ===> 2CO2 + 2H2O

Answer 9

https://answers.yahoo.com/question/index?qid=20090318081610AA5ZzQw

Answer 10

And remember to balance in order of CHO (carbon first then hydrogen then oxygen in a combustion reaction) it's easy this way :)