Question: A student concludes that a chemical reaction performed in a classroom investigation was exothermic. To communicate the validity of this conclusion, which would make the best visual evidence in a presentation?

What is the correct answer to the question from the following choices?
OPTIONS:
- photographs of reactants and products
- listing of masses of reactants and products
- listing of time from start to finish of reaction
- photograph of a flame produced when the chemicals reacted
photograph of a flame produced when the chemicals reacted
Fråga: En student drar slutsatsen att en kemisk reaktion som utfördes i en klassrumsundersökning var exotermisk. Att meddela giltigheten av denna slutsats, vilket skulle göra det bästa visuella beviset i en presentation? Vilket är det rätta svaret på frågan från följande val? Alternativ: - fotografier av reaktanter och produkter - lista över massor av reaktanter och produkter - lista över tid från reaktionens början till slut - fotografi av en låga som produceras när kemikalierna reagerade
Question: One student concludes that a chemical reaction performed in a classroom examination was exothermic. To announce the validity of this conclusion, which would make the best visual evidence in a presentation? What is the correct answer to the question from the following elections? Alternative: - photographs of reactants and products - list of lots of reactants and products - list of time from the beginning to the end of the reaction - photograph of a flame produced when the chemicals reacted
Fotografi av en låga som produceras när kemikalierna reagerade
Photograph of a flame produced when chemicals reacted