# Problem: When 5.50 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 61.16°C. If the specific heat capacity of the solution is 4.18 J/(g∙°C), calculate ΔH­rxn for the reaction, as written.            Ba(s) + 2 H2O(l)  →  Ba(OH)2(aq) + H2(g)              ΔH­rxn = ?A) –431 kJ          B) –3.14 kJ         C) +3.14 kJ       D) +431 kJ          E) –17.2 kJ

###### FREE Expert Solution
96% (273 ratings)
###### Problem Details

When 5.50 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 61.16°C. If the specific heat capacity of the solution is 4.18 J/(g∙°C), calculate Δrxn for the reaction, as written.

Ba(s) + 2 H2O(l)  →  Ba(OH)2(aq) + H2(g)              Δrxn = ?

A) –431 kJ

B) –3.14 kJ

C) +3.14 kJ

D) +431 kJ

E) –17.2 kJ

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Thermochemical Equations concept. You can view video lessons to learn Thermochemical Equations. Or if you need more Thermochemical Equations practice, you can also practice Thermochemical Equations practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofWhen 5.50 g of Ba(s) is added to 100.00 g of water in a cont...as high difficulty.

How long does this problem take to solve?

Our expert Chemistry tutor, Dasha took 7 minutes and 14 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Zhang's class at USF.