What is the identity of your unknown, how do you know? (flame test lab)

Work done = force ×distancebut force = mass ×gravityand gravity = 10m\s force = 2×10 = 20 work done = 20×3 = 60 joules

Ithink the answer is e

Because calorimetry is used to measure the heat of a reaction, it is a crucial part of thermodynamics. in order to measure the heat of a reaction, the reaction must be isolated so that no heat is lost to the environment. this is achieved by use of a calorimeter, which insulates the reaction to better contain heat.