The insulation of the styrofoam cups prevent any other heat (of course the insulation is not perfect), so the two heats must add to zero : Q1 + Q2 = 0 .
Why do you think we have to use two styrofoam cups?
He confided, “When I had the idea I was, like, extremely high.” Typically, lean is consumed out of two double stacked Stryofoam cups for two main reasons: one, it keeps the ice in your lean cold , and two, your purple or red lean can leak through the pores in the foam, but if you double cup it, it won’t.
Why are styrofoam cups often used as improvised calorimeter?
A styrofoam cup is used because styrofoam is a relatively good insulating material . ... To use the coffee cup calorimeter, one simply carries out the reaction to be studied inside the coffee cup, measures the temperature changes that take place, and then calculates the amount of heat lost or gained during the change.
Why do we use styrofoam cups?
Compared to making paper cups, manufacturing polystyrene cups: requires about 42 percent less water . needs about 17 percent less energy . uses 22 percent less petroleum to source materials and ship cups .
Can you drink alcohol in a Styrofoam cup?
Styrene can leach from cups and containers into hot drinks and food and bleed into alcohol or high-fat drinks and foods in particular. Consumers who drink beverages from polystyrene cups four times a day for three years will have ingested about one foam cup’s worth of styrene along with those beverages.
Does a Styrofoam cup absorb heat?
Styrofoam is made mostly of air, meaning it is a poor conductor of heat, but an excellent convector. It traps the air in small pockets, blocking the flow of heat energy. This reduces both conduction and convection and makes Styrofoam a good insulator.
Why is a calorimeter more accurate?
More reliable results can be obtained by repeating the experiment many times . The biggest source of error in calorimetry is usually unwanted heat loss to the surroundings. This can be reduced by insulating the sides of the calorimeter and adding a lid.
Is a Styrofoam cup a perfect calorimeter?
The outer cup is assumed to be perfectly adiabatic , meaning that it does not absorb any heat whatsoever. ... Coffee cup calorimeterA styrofoam cup with an inserted thermometer can be used as a calorimeter, in order to measure the change in enthalpy/heat of reaction at constant pressure.
Why is a styrofoam coffee cup a better calorimeter than a 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.
Why are Styrofoam cups bad?
Styrofoam contains Styrene with leaches into foods and drinks served in Styrofoam containers causing contamination . When the same container is exposed to sunlight, it creates harmful air pollutants that contaminate landfills and deplete the ozone layer.
What is the disadvantages of Styrofoam?
Disadvantages of EPS
Environmentalists generally disapprove of EPS foam products because they claim it wreaks havoc on the environment. One of the main concerns regarding EPS foam is that it’s not biodegradable and therefore takes up a lot of space in landfills, which adds to the pollution problem.
What are the benefits of Styrofoam?
- Superior insulation which protects produce from temperature changes.
- Dimensional stability and recovery.
- Light weight and easy to stack.
- Water resistant.
- Ideal for hydro cooling.
- Excellent shock absorption qualities.
- Resistant to bacterial growth.
What can you do with a Styrofoam cup?
- Seedling Starter. Styrofoam cups are great for use as seedling starters. ...
- Sound Amplifier for Tablets and Phones (Speaker) Who needs to buy a speaker when you can make your own from a styrofoam cup, a marker, and scissors? ...
- Organizer for small items. ...
- Lantern. ...
- Floam.
Does whiskey eat Styrofoam?
If you want to enjoy whiskey, grab a larger glass, but make sure it’s actually glass as other cups (plastic, styrofoam, etc.) will ruin the flavor . The best glasses for drinking whiskey are “rocks” glasses.
Can Styrofoam cup hold hot water?
Avoid using Styrofoam for hot/acidic food storage . While at work or out and about, bring your own mug for coffee and other hot beverages. Avoid using “disposable” polystyrene plastic plates and food containers for the sake of our landfills, at the very least.
Does Styrofoam hold heat?
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.
