What is the heat capacity of a Styrofoam cup calorimeter?
What is the heat capacity of a Styrofoam cup calorimeter?
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 should the heat capacity of a calorimeter be?
Ideally, the components of the calorimeter would absorb no heat, but the components of the calorimeters always absorb some energy from the system. The heat capacity of the calorimeter is the quantity of heat absorbed by the calorimeter for each 1°C rise in temperature.
How do you calculate average heat capacity?
The specific heat capacity is the heat or energy required to change one unit mass of a substance of a constant volume by 1 °C. The formula is Cv = Q / (ΔT ⨉ m) .
What is the specific heat capacity of polystyrene?
1300 – 1500
Specific heat of some products like wet mud, granite, sandy clay, quartz sand and more
| Substance | Specific Heat – cp – (J/kg C°) |
|---|---|
| Polypropylene | 1920 |
| Polystyrene | 1300 – 1500 |
| Polytetrafluoroethylene moulding compound | 1000 |
| Polytetrafluoroethylene (PTFE) | 1172 |
What is the specific heat capacity of a coffee cup calorimeter?
8.6 J/K.
The heat capacity of the apparatus is 8.6 J/K. The temperature rises to 33.73 oC.
Should a calorimeter have high or low heat capacity?
An “ideal” calorimeter would have a very low specific heat and zero thermal conductivity because the point is to conserve energy within the system.
How does heat capacity affect heat transfer?
The amount of heat transferred is proportional to the temperature difference between the objects and the heat capacity of the object. The heat capacity is a constant that tells how much heat is added per unit temperature rise. For a gas, the heat transfer is related to a change in temperature.
What is the Calorimetry equation?
The equation for calorimetry is Q = mc∆T, where Q= heat evolved, m= mass, c= specific heat capacity and ∆T= change in temperature.
Why is it important to determine the heat capacity of the calorimeter?
The heat capacity of the calorimeter or of the reaction mixture may be used to calculate the amount of heat released or absorbed by the chemical reaction. The amount of heat released or absorbed per gram or mole of reactant can then be calculated from the mass of the reactants.
How do you find C calorimeter?
We can determine Ccal by adding a known amount of heat and measuring the temperature change. The easiest way to add a known amount of heat is to add hot water to a calorimeter filled with cold water. Add 50.0 g of water which is at 100.0 °C to our calorimeter which contains 50.0 g of water at 23.0 °C.