- Grade 12 stuff: Simple heat energy question (lab)

So we're going to have a lab soon, and its goal is to find the heat energy value (Q). We're going to take a beaker filled with water, record its mass and initial temprature, and then bring a really hot iron washer inside and record its final temprature.

The first step is to calculate the heat energy the water gained, which is Q (The heat energy of the surroundings). Q = mcT, we have all the values. We're good on that part.
The second step is to calculate the energy the iron washer lost, that's just the negative of the first answer.
The third step is to find the change in temprature of the iron washer.. we have the heat capacity (c) of iron, mass, and heat energy (Q) lost, so it's easy to find the T value (re-arranging the equation).

However, the last question asks us to find the temprature of the bunsen burner flame. How do we do that?