The time component is needed. The acceleration is the change of velocity divided by the time in when this change of velocity happens.
^^^^^^^^^^^^^^^^^^^^^^^^^^^
Lets do
We know
The rate of change of velocity is acceleration .


Integrate both sides

As acceleration is constant .Take it outside of integral .On velocity we can take limit u to v and time from 0 to t

Hence



Explanation:
q = mCΔt
q = (2.3 kg) (385 J/kg/K) (80.0°C − 20.0°C)
q ≈ 53,000 J
q ≈ 53 kJ