A weather balloon was launched from a research station at Anderson Air Force Base on the island of Guam (standard pressure). When the balloon was launched, the temperature
was 24 °C and the volume of the balloon was 14.8 m2. At an altitude of 11 000 meters,
the volume of the balloon had increased to 50.0 m and the temperature had dropped to
-56 °C. What was the pressure in atmospheres of the balloon at that altitude?

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

"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"

po-215 i got it right on the quiz