Question

When a 7.00 g sample of KCN is dissolved in water in a calorimeter that has a total heat capacity of 2.73 kJ K the temperature decreases by 0.460 K. Calculate the molar heat of solution of KCN.

Answer 1

To calculate the molar heat of solution of KCN, we can use the equation Q = mcΔT and rearrange it to solve for AHsoln.

Step-by-step explanation:

The molar heat of solution of KCN can be calculated using the equation:

Q = mcΔT

Where:
Q is the heat gained by the water,
m is the mass of water, and
c is the specific heat capacity of water
ΔT is the change in temperature of the water.

We can rearrange the equation to solve for Q:

Q = AHsoln x n

Where:
AHsoln is the molar heat of solution of KCN, and
n is the number of moles of KCN.

We can calculate n using the molar mass of KCN:
n = mass / molar mass

Substituting the given values into the equations, we can calculate the molar heat of solution of KCN.