How much energy does it take to boil 100 mL of water? (Refer to table of constants for water.)
A. 100 mL x
1 g
х
1 mL
1 mol
18.02 g
x 40.65 kJ/mol = 226 kJ
B. 100 mL x
1 g
1 mL
X
1 mol
18.02 g
(-285.83 kJ)/mol = –1586 kJ
C. 100 mL x
1 g
X
1 mol
18.02 g
x 4.186 kJ/mol = 23.2 kJ
1 mL
1 g
D. 100 mL x
1 mL
1 mol
x
18 02 g
x 6.03 kJ/mol = 33.5 kJ

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: