The table shows the chemical formulas for four substances. Substance
Chemical
Formula
1
2
CHO
C.418
CH, CH, Br
CHO
3
4
Which substances have the same number of carbon atoms?
A Substances 1 and 2
B Substances 2, 3, and 4
C Substances 2 and 3 only
D Substances 1 and 3
.
ОА

personal, she chose to do it.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

the answer is c

tell me if wrong