Final answer:
The correct expression for calculating the specific heat (C) of an unknown material is A) C = Q / (mΔT), where Q is heat transfer, m is mass, and ΔT is temperature change.
Step-by-step explanation:
To determine the specific heat (C) of an unknown material, we must rearrange the equation that relates heat transfer (Q) to specific heat (C), mass (m), and temperature change (ΔT). The correct equation and expression for calculating specific heat is given by C = Q / (mΔT). This formula is derived from the principle that the amount of heat (Q) absorbed or released by a substance is proportional to the mass (m) of the substance and the change in temperature (ΔT), and inversely proportional to the specific heat (C) of the substance. Therefore, option A) C = Q / (mΔT) is the correct expression for the specific heat of the unknown material.