When 150 G of Ba(s)is Added to 100

question 114

Multiple Choice

When 1.50 g of Ba(s) is added to 100.00 g of water in a container open to the atmosphere,the reaction shown below occurs and the temperature of the resulting solution rises from 22.00°C to 33.10°C.If the specific heat of the solution is 4.18 J/(g ∙°C) ,calculate ΔH for the reaction,as written.
Ba(s) + 2 H₂O(l) → Ba(OH) ₂(aq) + H₂(g) ΔH = ?

• A)-431 kJ
• B)-3.14 kJ
• C)3)14 kJ
• D)431 kJ

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Definitions:

Third Energy Level

The third energy level in an atom is the third shell that surrounds the nucleus, where electrons can be found.

Protons

Positively charged particles found within atomic nuclei that, along with neutrons, define the atomic mass.

Electrons

Subatomic particles with a negative charge, orbiting the nucleus of an atom and involved in chemical bonds and electricity.

Hydrogen Bonds

Weak bonds that form between a hydrogen atom in one molecule and a more electronegative atom, such as oxygen or nitrogen, in another, playing critical roles in the structure of DNA and proteins.