A copper block of mass 2 kg is heated from 20°C to 100°C. If the specific heat capacity of copper is \( 400 \, \text{J/kg°C} \), how much heat energy is absorbed by the block? (Assume no phase change occurs.)
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When calculating heat energy, ensure the specific heat capacity and temperature change are consistent. Use \( Q = m c \Delta T \) for temperature changes without phase transitions, and double-check units.