Physics, 08.10.2019 01:30 nhs5

Astudent wishes to determine the heat capacity of a coffee-cup calorimeter. after she mixes 94.8 g of water at 60.4°c with 94.8 g of water, already in the calorimeter, at 22.3°c, the final temperature of the water is 35.0°c. calculate the heat capacity of the calorimeter in j/k. use 4.184 j/g°c as the specific heat of water. enter to 1 decimal place.

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Answer from: loravillanueva87

396.65 JC⁻¹

Explanation:

$m_{a}$ = mass of water added to calorimeter = 94.8 g

$T_{ai}$ = initial temperature of the water added = 60.4 C

$c_{w}$ = specific heat of water = 4.184 Jg⁻¹C⁻¹

$m_{c}$ = mass of water available to calorimeter = 94.8 g

$T_{ci}$ = initial temperature of the water in calorimeter = 22.3 C

$T_{f}$ = final equilibrium temperature = 35 C

$Q_{C}$ = Heat gained by calorimeter

Using conservation of heat

Heat gained by calorimeter = Heat lost by water added - heat gained by water in calorimeter

$Q_{C} = m_{a} c_{w} (T_{ai} - T_{f}) - m_{c} c_{w} (T_{f} - T_{ci})$

$Q_{C} = (94.8) (4.184) (60.4 - 35) - (94.8) (4.184) (35 - 22.3)$

$Q_{C} = 5037.4$ J

= Change in temperature of calorimeter

Change in temperature of calorimeter is given as

$T = T_{f} - T_{ci}$

T = 35 - 22.3

T = 12.7 C

Heat capacity of calorimeter is given as

$c_{cm} = \frac{Q_{C}}{T}$

$c_{cm} = \frac{5037.4}{12.7}$

$c_{cm} = 396.65$ JC⁻¹

Answer from: Quest

answer: 0

explanation: im 14

Answer from: Quest

Acetic acid /əˈsiːtɪk/, systematically named ethanoic acid /ˌɛθəˈnoʊɪk/, is a colourless liquid organic compound with the chemical formula ch3cooh (also written as ch3co2h or c2h4o2). when undiluted, it is sometimes called glacial acetic acid. vinegar is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water. acetic acid has a distinctive sour taste and pungent smell. in addition to household vinegar, it is mainly produced as a precursor to polyvinyl acetate and cellulose acetate. it is classified as a weak acid since it only partially dissociates in solution, but concentrated acetic acid is corrosive and can attack the skin.acetic acidnamespreferred iupac nameacetic acidsystematic iupac nameethanoic acidother namesvinegar (when dilute); hydrogen acetate; methanecarboxylic acid[1][2]identifierscas number64-19-7 3d model (jsmol)interactive image3dmetb00009 reference506007chebichebi: 15366 chemblchembl539 chemspider171 drugbankdb03166 echa infocard100.000.528ec number200-580-7e numbere260 (preservatives)gmelin reference1380iuphar/bps1058keggd00010 meshacetic+acidpubchem cid176rtecs numberaf1225000uniiq40q9n063p un number2789inchiinchi=1s/c2h4o2/c1-2(3)4/h1h3,(h,3,4) key: qtbsbxvteameqo-uhfffaoysa-n smilescc(o)=o

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Astudent wishes to determine the heat capacity of a coffee-cup calorimeter. after she mixes 94.8 g o...

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