Why is a polystyrene cup used in Neutralisation?

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.

Why the Styrofoam cup must be placed in a beaker during experiment?

The use of an insulated container (Styrofoam cup in this experiment) allows us to assume that there is no heat transferred through the calorimeter walls. In reactions carried out at constant pressure, the heat that is absorbed or given off is called the heat or enthalpy of reaction (ΔH).

Do polystyrene cups absorb heat?

The polystyrene foam Styrofoam is made of trapped air bubbles that prevent heat energy from flowing through it. This prevents heat loss, making Styrofoam an excellent insulator.

What is a polystyrene beaker?

Disposable polystyrene (PS) beakers feature four-way pour spouts and are available in sizes ranging from 5mL to 1000mL volumes. The beakers can withstand temperatures up to 200°F and offer excellent chemical resistance to dilute or weak acids, aqueous solutions, alcohols and bases.

What is a polystyrene cup?

White expanded polystyrene (styroweave) drink cups are an economical approach to storing and transporting both hot and cold liquids such as tea, coffee, hot chocolate or even cereal.

Why plastic cup is used in experiment for heat of displacement?

Explanation: plastic cup is a poor conductor of heat and can reduce heat lost to the surroundings.

Why does polystyrene keep things hot?

Styrofoam is a good insulator, keeping things warm or cold, due to the gases (air) trapped within. Gases decrease heat conduction because the molecules are very far apart. This makes it difficult for other molecules to collide with them and either give or take away energy.

Why is a foam cup used in a student calorimeter rather than a typical glass beaker?

The foam cup acts as an insulator. This means that less, if any, heat can escape. This will allow the calorimeter to be more precise.

What are the properties of polystyrene?

Polystyrene Characteristics Unmodified polystyrene is clear, rigid, brittle and moderately strong. Its electrical properties as a dielectric material are good, though it has relatively low heat resistance. Polystyrene is soluble in most chlorinated and aromatic solvents, though not in alcohols.

What is the heat capacity of Styrofoam cup?

0.27ca
Styrofoam is a material that is made of expanded polystyrene foam (EPS). It is generally used to make food containers, coffee cups etc. The specific heat capacity of Styrofoam is calculated experimentally as 0.27calgm−1oC−1 or 1131Jkg−1K−1.

What happens when zinc plate is kept in copper sulphate solution?

Zinc is more reactive than copper and hence, it displaces copper from copper sulphate solution. As a result, a number of holes were observed on the zinc plate.

Is heat of displacement exothermic or endothermic?

Displacement reaction occurs when a metal which is situated at a higher position in the electrochemical series displace a metal below it from its salt solution. Displacement reaction is always an exothermic reaction.