Question

Zac and George carried out these reactions in polystyrene cups rather than glass beakers. Suggest why this was a sensible idea.

Answer 1

Answer:

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Explanation:

When investigating energy changes in neutralisation reactions why is a polystyrene cup used instead of a glass beaker? ,Expanded polystyrene cups are very good thermal insulators, which prevents heat from being lost through the sides of the cup.

This is to minimize heat loss to the surroundings as polystyrene is a good thermal insulator.

Since enthalpy change of neutralization (delta H) = – heat of neutralization (Q)/number of moles of the liquid in the cup (n) and Q = mc(delta -theta), if heat is lost to the surroundings, the calculation for delta H will be inaccurate.

Hope this helps!