What is wrong with the following statement? Hal says that his teacher is solely responsible for preventing laboratory accident.

Hal is wrong because the teacher can instruct the student, but no make all the choices in a lab.Students must always wear ppe (personal protection equipment) , use proper lab protocol, and conduct themselves in a responsible manner. It is NOT the work of a teacher to ensure lab safety, but in fact the responsibility of said students.

"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"