Animalscaretips
Why did you need to transfer the metal quickly from the hot water bath to the water in the styrofoam cup calorimeter? Because the minimal amount of heat is lost from the metal into the air & once the metal is removed. Its tenperature will begin to be near room temp.
- Why is a measure of water needed to determine the specific heat of a metal?
- Why is water used in a calorimeter?
- How many calories are required to raise the temperature of 225 g of water from 42 C to 75 C?
- Why are Styrofoam cups used as calorimeters?
- Why is it important to stir continuously during the experiment?
- Why is energy required for the boiling process?
- Why is it important to know the heat absorbed by the calorimeter?
- Why is it necessary to know the heat capacity of a calorimeter?
- Why is it important to have enough water in the calorimeter to completely cover the metal?
- Why do you need to transfer the metal quickly?
- How many calories are required to raise the temperature of water?
- How is the calorie value of a food sample determined?
- Why does the experiment used a Styrofoam cup instead of a metal one?
- Why is Styrofoam better than metal?
- Why is a metal can used in calorimetry?
Why is a measure of water needed to determine the specific heat of a metal?
Why is a measured amount of water needed to determine the specific heat of a metal object? the temperature change in water is used while calculating specific heat. as the metal is losing heat the water is gaining heat. ... Non metals tend to have high electronegativity values and thus share electrons rather than lose them.
Why is water used in a calorimeter?
Water has a high specific heat, which means it is difficult to increase the temperature of water. However, water also has the capacity to retain heat, which allows the other substance inside the calorimeter to absorb that heat.
How many calories are required to raise the temperature of 225 g of water from 42 C to 75 C?
Approx. 30⋅kJ .
Why are Styrofoam cups used as calorimeters?
The role of the Styrofoam in a coffee cup calorimeter is that it reduces the amount of heat exchange between the water in the coffee cup and the surrounding air. The value of a lid on the coffee cup is that it also reduces the amount of heat exchange between the water and the surrounding air.
Why is it important to stir continuously during the experiment?
It is important to continuously stir the mixture in order to keep the reaction going. If the stirring slows or stops, the reaction itself will stop. ... It is important to continuously stir the mixture in order to make sure the tempera- ture of the solution is the same throughout the entire volume.
Why is energy required for the boiling process?
Boiling water is an endothermic process, which supplies heat to the water molecules, increasing their potential energy. The applied heat causes the water molecules to move further away from each other without causing any increase in overall temperature.
Why is it important to know the heat absorbed by the calorimeter?
Calorimeters are insulated to prevent loss or gain of heat between the calorimeter and its surroundings so that heat flow in the system can be measured. ... If the chemical reaction is endothermic, heat is absorbed and the temperature of the system decreases.
Why is it necessary to know the heat capacity of a 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.
Why is it important to have enough water in the calorimeter to completely cover the metal?
Why is it important for there to be enough water in the calorimeter to completely cover the metal sample? ... The water in the beaker gets its heat energy from the in the calorimeter gets its heat energy from the 4.
Why do you need to transfer the metal quickly?
Why did you need to transfer the metal quickly from the hot water bath to the water in the styrofoam cup calorimeter? Because the minimal amount of heat is lost from the metal into the air & once the metal is removed. ... Water has one of the largest specific heats of any substance.
How many calories are required to raise the temperature of water?
Well, each ml of water requires one calorie to go up 1 degree Celsius, so this liter of water takes 1000 calories to go up 1 degree Celsius.
How is the calorie value of a food sample determined?
How is the caloric value of a food sample determined? By multiplying the total amount in grams of a given food sample by energy values established by nutritionists for the particular food type.
Why does the experiment used a Styrofoam cup instead of a metal one?
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 other words, we can assume that the thermodynamic universe is composed of the system and the surrounding water.
Why is Styrofoam better than metal?
Styrofoam is made mostly of air, meaning it is a poor conductor of heat, but an excellent convector. ... This reduces both conduction and convection and makes Styrofoam a good insulator. On the other hand, conductors such as metal are poor insulators because energy flows through them.
Why is a metal can used in calorimetry?
Heat loss - As you note, metal conducts heat much more effectively than styrofoam. This means that the metal calorimeter will carry the heat of the reaction away from the reaction vessel to the outside world faster than styrofoam will.
