# Question #9a43b

Depends... did you measure your object to cool down or heat up? If it heated up, then is ${T}_{2} > {T}_{1}$, or ${T}_{2} < {T}_{1}$? If it cooled down, then is ${T}_{2} < {T}_{1}$, or ${T}_{2} > {T}_{1}$?
Always connect observations back to physical reality. Is $\Delta T$ negative or positive if ${T}_{2} = \text{320 K}$ and ${T}_{1} = \text{300 K}$?