Question

When a 16.9 g sample of NaOH dissolves in 70.0 g of water in a calorimeter, the temperature rises from 22.4 °C to 86.6 °C. (specific heat for water = 4.18 J/gºC). How much heat did the reaction generate?

Answer 1

To calculate the amount of heat generated by the reaction, use the equation q = mcΔT. Substitute the values and calculate the heat.

Step-by-step explanation:

To calculate the amount of heat generated by the reaction, we can use the equation q = mcΔT, where q is the heat, m is the mass, c is the specific heat, and ΔT is the change in temperature. First, we need to calculate the specific heat of the solution using the specific heat of water. The total mass of the solution is the sum of the mass of NaOH and the mass of water.

mass of NaOH = 16.9 g

mass of water = 70.0 g

total mass of solution = mass of NaOH + mass of water

Next, we can calculate the change in temperature (ΔT) using the final temperature minus the initial temperature.

ΔT = final temperature - initial temperature

Finally, we can substitute the values into the equation q = mcΔT to calculate the heat generated by the reaction.