30 a student is conducting an experiment to determine whether a chemical reaction is exothermic or endothermic. she plans to perform the reaction inside a metal container and record any temperature changes using an alcohol thermometer. how should the experiment be modified to obtain a more reliable result? a. she should use an insulating container b. she should use a digital thermometer c. the thermometer should be attached to the outside of the container d. the chemical reaction should not take place in a solution