Two separate experiments are carried out to determine the enthalpy change, $\Delta H$, for each reaction. The temperature of each reaction mixture is recorded at the start of the reaction and again after 3 minutes. Which row shows the correct sign of the value of $\Delta H$ for each experiment and states whether the reaction is endothermic or exothermic?
- Aexperiment 1: negative and endothermic; experiment 2: positive and exothermic
- Bexperiment 1: negative and exothermic; experiment 2: positive and endothermic
- Cexperiment 1: positive and endothermic; experiment 2: negative and exothermic
- Dexperiment 1: positive and exothermic; experiment 2: negative and endothermic