Question

Assume you have boiling water surrounding a test-tube containing a sample of copper and water(which shouldnt be there). You add the copper + water to a calorimeter containing room temp water. How will the addition of water effect the temperature change inside the test tube?

Answer 1

My idea is that if you add water that is boiling + copper to the calorimeter that has room temperature water that the change in temperature inside the calorimeter will be reported inaccurately as too high

Answer 2

Or because the question doesn't truly specify if the water inside the test tube is boiling it is possible that the addition of water will lower the temperature change inside the calorimeter as you are only introducing more mass of h2o.

Answer 3

Not entirely sure on what the course of the experiment is,

is this right? If so, you're right that the change in temperature will be too high as the specific heat capacity of water is much larger than that of Cu.