Calculate the final temperature of 30mL of ethanol initially at 15∘C upon absorption of 913J of heat. (density of ethanol =0.789 g/mL)

q = mass ethanol x specific heat ethanol x (Tfinal-Tinitial)

To calculate the final temperature of the ethanol, we can use the formula:

Q = m * c * ΔT

Where:
Q = Heat absorbed or released (in joules)
m = Mass of the substance (in grams)
c = Specific heat capacity of the substance (in J/g°C)
ΔT = Change in temperature (in °C)

First, let's calculate the mass of ethanol:

Mass of ethanol = Volume of ethanol * Density of ethanol
Mass of ethanol = 30 mL * 0.789 g/mL

Next, we need to convert the mass from grams to joules. To do this, we'll multiply it by the specific heat capacity of ethanol. The specific heat capacity of ethanol is approximately 2.44 J/g°C.

Now, with the mass and specific heat capacity known, we can rearrange the formula to solve for the change in temperature (ΔT):

ΔT = Q / (m * c)

Plugging the values we have into the formula, we can find the change in temperature.

ΔT = 913 J / (mass * 2.44 J/g°C)

Finally, we can calculate the final temperature by adding the change in temperature (ΔT) to the initial temperature (15°C):

Final temperature = Initial temperature + ΔT

Now, let's calculate the final temperature step-by-step:

1. Calculate the mass of ethanol:
Mass of ethanol = 30 mL * 0.789 g/mL

2. Calculate the change in temperature (ΔT):
ΔT = 913 J / (mass * 2.44 J/g°C)

3. Calculate the final temperature:
Final temperature = Initial temperature + ΔT

Following these calculations, you will find the final temperature of the ethanol.