Quiz Page 10 of 10 A sample of an unknown metal with a mass of 17.8...

Quiz

Page 10 of 10

A sample of an unknown metal with a mass of 17.8 grams is heated in boiling water to a temperature of 98.0°C. The piece of metal is transferred to a sample of water with a mass of 15.0 grams at a temperature of 26.0°C. The metal cools to 30.5°C and the water warms up to 30.5°C. Calculate the specific heat of the metal. Use the table of specific heat values to identify the metal.

Options:

	copper
	aluminum
	lead
	silver
	iron

Expert Solution

Heat lose of metal = Heat gain of water

mct = mct

17.8*C*(98-30.5) = 15*4.184*(30.5-26)

c = 0.235J/g-c⁰

that metal is silver .It's heat capacity is 0.235J/g-c⁰

queen_honey_blossom answered 1 year ago

Identification of Metal..................Copper......Copper.......Unknown......Unknown Mass of test tube & metal shot...74.4593g...132.8115g...85.5094g.....61.018g Mass of test tube........................32.0003g.....32.003g.....32.003g.........32.00

Identification of Metal..................Copper......Copper.......Unknown......Unknown Mass of test tube & metal shot...74.4593g...132.8115g...85.5094g.....61.018g Mass of test tube........................32.0003g.....32.003g.....32.003g.........32.003g Mass of the metal sample..........42.4562g.....100.8085g...53.5064g.....29.015g Mass of the set-up......................3.2639g.......3.2639g.......3.2639g.......3.2639g Mass of set-up&water.............101.7857g....100.9825g...99.5694g....100.7855g Mass of water in calorimeter.......98.5218g......97.7186g....96.3055g....97.5216g Initial temperature of metal sample...100C......100C..........100C............100C Initial temperature of water..........23.55C..........25.29C........24.3213C....24.73C Final temperature of water and metal25.55C....31.75C.......27.8417C....27.83C ΔTwater........................................2C..................6.46C.........3.52C..........3.1C ΔTmetal ....................................-74.85C............-68.25........27.8417C....27.83C Specific Heat of water............................4.184J/gC..................................... Heat energy gained by the water .....?....................?.................?.................? Heat lost by the metal.......................?....................?.................?.................? Calculated Specific heat...................?....................?.................?.................? Average Specific heat ............................................?.....................................? Actual Specific Heat of metal..................................0.385..............................? % error....................................................................?......................................? Show...

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