Anondirectional alternative hypothesis claims that no difference will be found between the research variables.
a. true
b. false

The given statement is False.

According to alternative hypothesis, observed difference exists between research variables, which does not occur by chance.

Whereas, a non directional alternative hypothesis has no definite directions of the difference but a certain difference does exist.

Thus, the given statement is False.

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

c.

explanation: