NaOH + HCl ------> NaCl + HOH
I need to figure out the quantity of heat in this reaction. The volume of the solution is 150 mL (NaCl + HOH). The inital temperature is 26 degrees celcius and the final temperature is 23 degrees celcius. That's all I know. How would I go about figuring this out?
q=m*c*delta T
q is the heat generated, m is the mass (150 g unless you are given some number of density for water other than 1.00 g/mL), and delta T is Tfinal-Tinitial.
Please note the correct spelling of celsius.
To determine the quantity of heat in a reaction, you can use the equation:
q = m * C * ΔT
where:
q is the quantity of heat (in joules),
m is the mass of the solution (in grams),
C is the specific heat capacity of the solution (in joules per gram per degree Celsius),
ΔT is the change in temperature (in degrees Celsius).
However, to use this equation, we need to know the mass and specific heat capacity of the solution. Given that you only have information about the volume of the solution and the initial and final temperatures, we need to make some assumptions and approximations.
First, we need to convert the volume of the solution from milliliters (mL) to grams (g). This requires the density of the solution, which we are not given. However, we can assume that the solution has a density of 1 g/mL, as it is a dilute aqueous solution.
So, the mass of the solution = volume of the solution * density = 150 mL * 1 g/mL = 150 g
Next, calculate the change in temperature (ΔT) by subtracting the final temperature from the initial temperature:
ΔT = final temperature - initial temperature = 23°C - 26°C = -3°C
Now, we need the specific heat capacity of the solution. However, we can make an approximation by assuming that the specific heat capacity of the solution is close to that of water, which is 4.18 J/g°C.
Now we can substitute the values into the equation:
q = m * C * ΔT
= 150 g * 4.18 J/g°C * -3°C
= -1881 J (rounded to the nearest whole number)
The negative sign indicates that heat is released in the reaction.
Therefore, the quantity of heat released in this reaction is approximately -1881 joules.