e2.7 please help A piece of unknown material has a mass of m,= 0.79 kg and an initial temperature of T= 76°C. The specific heat of water is cw=4.180 x 103 J/(kg.°C).> * 50% Part (a) The sample of material is dropped into m, = 1.3 kg of water at Tw= 18°C in a calorimeter. The calorimeter reaches a final temperature ofTf= 31°C. Enter an expression for the specific heat of the unknown material, in terms of the defined quantities.C1=mw Cw ( Tf - Tu )my ( Ty - Tw))|789HOMECwg↑^^6m123mwnPENDTfTuTwVol BACKSPACEDELCLEARSubmitHintFeedbackI give up!E * 50% Part (b) Calculate the specific heat of the unknown material, in units of joules per kilogram per degree Celsius.

Mu= 0.79 kg , Tu= 76°C Mw= 1.3kg, Tw = 18°C Tf= 31°C Cw= 4.18×103 J/kg°C Cu= ?

A piece of unknown material has a mass of m, = 0.79 kg and an initial temperature of Ty = 76°C. The specific heat of water is cw= 4.180 x 10 J(kg C). O* 50% Part (a) The sample of material is dropped into mw = 1.3 kg of water at Tw = 18°C in a calorimeter. The calorimeter reaches a final temperature of T= 31°C. Enter an expression for the specific heat of the unknown material, in terms of the defined quantities. Cy = (mw Cw ( Tf- Tu)( my ( Ty - Tw ) 78 9 HOME Cw d 4 5 m P END Tf Tu VO BACKSPACI Submit Hint Feedback I give up! E* 50% Part (b) Calculate the specific heat of the unknown material, in units of joules per kilogram per degree Celsius.

A piece of unknown material has a mass of m, = 0.79 kg and an initial temperature of Ty = 76°C. The specific heat of water is cw= 4.180 x 10 J(kg C). O* 50% Part (a) The sample of material is dropped into mw = 1.3 kg of water at Tw = 18°C in a calorimeter. The calorimeter reaches a final temperature of T= 31°C. Enter an expression for the specific heat of the unknown material, in terms of the defined quantities. Cy = (mw Cw ( Tf- Tu)( my ( Ty - Tw ) 78 9 HOME Cw d 4 5 m P END Tf Tu VO BACKSPACI Submit Hint Feedback I give up! E* 50% Part (b) Calculate the specific heat of the unknown material, in units of joules per kilogram per degree Celsius.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter21: Heat And The First Law Of Thermodynamics

Section: Chapter Questions

Problem 68PQ

See similar textbooks

Similar questions

One way to cool a gas is to let it expand. When a certain gas under a pressure of 5.00 106 Ha at 25.0C is allowed to expand to 3.00 times its original volume, its final pressure is 1.07 106 Pa. (a) What is the initial temperature of the gas in Kelvin? (b) What is the final temperature of the system? (See Section 10.4.)
A hollow aluminum cylinder 20.0 cm deep has an internal capacity of 2.000 L at 20.0C. It is completely filled with turpentine at 20.0C. The turpentine and the aluminum cylinder are then slowly warmed together to 80.0C. (a) How much turpentine overflows? (b) What is the volume of the turpentine remaining in the cylinder at 80.0C? (c) If the combination with this amount of turpentine is then cooled back to 20.0C, how far below the cylinders rim does the turpentines surface recede?
Suppose 26.0 g of neon gas are stored in a tank at a temperature of 152C. (a) What is the temperature of the gas on the Kelvin scale? (See Section 10.2.) (b) How many moles of gas are in the tank? (See Section 10.4.) (c) What is the internal energy of the gas? (See Section 10.5.)
A hollow aluminum cylinder 20.0 cm deep has an internal capacity of 2.000 L at 20.0C. It is completely filled with turpentine at 20.0C. The turpentine and the aluminum cylinder are then slowly warmed together to 80.0C. (a) How much turpentine overflows? (b) What is the volume of the turpentine remaining in the cylinder at 80.0C? (c) If the combination with this amount of turpentine is then cooled back to 20.0C, how far below the cylinders rim does the turpentines surface recede?
A granite ball of radius 2.00 m and emissivity 0.450 is heated to 135C. (a) Convert the given temperature to Kelvin. (b) What is the surface area of the ball? (c) If the ambient temperature is 25.0C, what net power does the ball radiate?
A certain ideal gas has a molar specific heat of Cv = 72R. A 2.00-mol sample of the gas always starts at pressure 1.00 105 Pa and temperature 300 K. For each of the following processes, determine (a) the final pressure, (b) the final volume, (c) the final temperature, (d) the change in internal energy of the gas, (e) the energy added to the gas by heat, and (f) the work done on the gas. (i) The gas is heated at constant pressure to 400 K. (ii) The gas is heated at constant volume to 400 K. (iii) The gas is compressed at constant temperature to 1.20 105 Pa. (iv) The gas is compressed adiabatically to 1.20 105 Pa.
One of a dilute diatomic gas occupying a volume of 10.00 L expands against a constant pressure of 2.000 atm when it is slowly heated. If the temperature of the gas rises by 10.00 K and 400.0 J of heat are added in the process, what is its final volume?
A granite ball of radius 2.00 m and emissivity 0.450 is heated to 135C. (a) Convert the given temperature to Kelvin. (b) What is the surface area of the ball? (c) If the ambient temperature is 25.0C, what net power does the ball radiate?
Equal masses of substance A at 10.0C and substance B at 90.0C are placed in a well-insulated container of negligible mass and allowed to come to equilibrium. If the equilibrium temperature is 75.0Q which substance has the larger specific heat? (a) substance A (b) substance B (c) The specific heats are identical. (d) The answer depends on the exact initial temperatures. (e) More information is required.