Question 5 (4 points) A 2.00 g marshmallow is combusted under a flask containing 50.0 g of water at an initial temperature of 25.0°C. After the combustion of the
marshmallow, 0.30 g of charred marshmallow remained and the temperature of the water increased to 75.0°C.
Determine the energy gained by the water.
Specific heat of water is 4.184/°C or 1 cal/g°C
Оа
b
Ос
Od
-356 joules
+356 joules
+10.5 k)
-10.5 kJ

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.