If powdered sodium carbonate is added to aqueous ethanoic acid, the temperature of the resulting mixture goes down. Which statement about this reaction is correct?
- AThe reaction is endothermic and $\Delta H$ is negative.
- BThe reaction is endothermic and $\Delta H$ is positive.
- CThe reaction is exothermic and $\Delta H$ is negative.
- DThe reaction is exothermic and $\Delta H$ is positive.