If a metal cup were used in place of a Styrofoam cup, the value of c(aluminum) determined would increase. True or False
Ans : True
Styrofoam cups are insulating , so that the heat released by the metal will not be exchanged with the surroundings. The metal cups are not insulating due to which heat exchange occurs with the surroundings and the change in temperature decreases. Decrease in change in temperature causes incorrectly increased value of c i.e. specific heat of aluminium.
If a metal cup were used in place of a Styrofoam cup, the value of c(aluminum)...
If a metal cup were used in place of a Styrofoam cup, the value of c(water) determined would increase. True or False
A piece of aluminum at -4.7 °C is placed in a styrofoam cup with 74 mL of water initially at 29 °C. The final temperature of the water is 28.2 °C. What is the mass of the aluminum?
Calorimetry Materials: Styrofoam cup & lid Digital thermometer Metal sample Graduated cylinder Beaker Test tube with stopper Heating setup for beaker Behind a calorimetry experiment is the known occurrence of heat flow from a warm object to a cooler object. Heat scales with the amount of matter and also depends on the resistance of an object to change temperature. Temperature is just the average of the amount of energy contained inside a given area. Heat is represented by the letter...
a. Predict A paper clip will be suspended from a string inside a Styrofoam cup surrounded by aluminum foil. Predict what will happen to the paperclip when a charged rod is brought near the cup. b. Predict what will happen when one of the poles of the magnet is brought near the cup? c. Experimental setup Carry out the experiments described in a and b. Describe your observations. Were your predictions correct? Do you know why? d. Interpret Based on...
A 46.5 g ice cube, initially at 0°C, is dropped into a Styrofoam cup containing 384 g of water, initially at 21.6°C. What is the final temperature of the water, if no heat is transferred to the Styrofoam or the surroundings?
The In the laboratory a "coffee cup calorimeter, or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solution phase reaction. A student heats 61.44 grams of titanium to 97.72 °C and then drops it into a cup containing 83.69 grams of water at 21.75 °C. She measures the final temperature to be 27.96 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant)...
In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solutiorn phase reaction. Thermometer Stirring rod A student heats 63.92 grams of iron to 98.03 °C and then drops it into a cup containing 75.92 grams of water at 24.47 °C. She measures the final temperature to be 30.66 °C The heat capacity of the calorimeter (sometimes referred to as the...
A 20.64 g ice cube at -1.93 oC is place in an aluminum cup whose initial temperature is 137.9 oC. The system comes to an equilibrium temperature of 17.96 oC. What is the mass in grams of the cup? The specific heat of ice is 2.093 J/g oC and that of aluminum is 0.901 J/g oC.
A Styrofoam cup holding 100 g of hot water at 84°C cools to room temperature, 21.0°C. What is the change in entropy of the room? Neglect the specific heat of the cup and any change in temperature of the room. J/K
1.If you used a Yeti Vacuum Insulated Tumblert instead of a styrofoam cup for the calorimeter, would the value of Hf MgO(s) be higher or lower? Explain. 2. Comment on the accuracy of your results by discussing the percent error. Was your experimental result greater or less than expected? What one specific factor might reasonably explain your percent error? How would the factor affect the result (would it make your experimental value too large or too small?)? My percentage error...