A 57.1 g sample of polystyrene, which has a specific heat capacity of 1.880 J-g¹C, is put into a calorimeter (see sketch at right) that contains 100.0 g of water. The temperature of the water starts off at 23.0 °C. When the temperature of the water stops changing it's 38.3 °C. The pressure remains constant at 1 atm. Calculate the initial temperature of the polystyrene sample. Be sure your answer is rounded to 3 significant digits. °C 0.9 X

Q: In an experiment, a 1.3440 g sample of dimethyl oxalate (C4H6 O4) is burned completely in a bomb…

A: The objective of this question is to calculate the molar heat of combustion of dimethyl oxalate…

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Q: 11 A chemist carefully measures the amount of heat needed to raise the temperature of a 511.0 mg…

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Q: 14. A calorimeter with a mass of 1.63 kg and a specific heat capacity of 897.5 J/kg.K contains 880 g…

A: Solution :      Molar heat of combustion is the amount of heat released when one mole of the…

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A: Heat absorb by substance A = (-) Heat release by substance B mACA∆T = - mBCB∆T

Q: thermometer A 54.4 g sample of quartz, which has a specific heat capacity of 0.730 J-g °C, is put…

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Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A: given , WCaBr2    = 1.72 g  M CaBr2 =   200g/mol nCaBr2   = 1.72g/200g/mol ) WH2O  =  107.30 g…

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A: When 21.7 kj of heat is added temperature rise is of 4.49°C.When 1.75 g methanol burnt temperature…

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Q: Consider the reaction C12H22011 (s) + 12 O2 (g) → 12 CO2 (g) + 11 H20 (1) in which 10.3 g of…

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Q: The student transferred 50.0 mL 1.00 M HCl into a coffee-cup calorimeter, which had a temperature of…

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Q: 64.36 kJ/g. A 63.61-g sample is burned in an apparatus with a calorimeter constant of 56.13 kJ/oC.…

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Q: In an experiment, 138 g of graphite is heated to 90.0°C and then quickly transferred to 150.0 g of…

A: The heat released by graphite (q1) is determined using equation (1) as follows:

Q: 9. When 0.625 grams of ethanol (C2HSOH) undergoes combustion in a bomb calorimeter attaining a…

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Q: The combustion of titanium with oxygen produces titanium dioxide:       Ti(s) + O2(g)  → TiO2(s)…

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Q: A 32.1 g piece of aluminum (which has a molar heat capacity of 24.03 J/°C·mol) is heated to 82.4°C…

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Q: Solid calcium chloride dissolves in water according to the equation below. CaCl2 (s) ➝ Ca+2 (aq) +…

A: CaCl2 (s) ➝ Ca+2 (aq) + 2 Cl – (aq)      ΔHº = –81.3 kJ/mol Heat evolved = heat absorbed = Q Q = m .…

Q: -1 A 56.1 g sample of polystyrene, which has a specific heat capacity of 1.880 J-g °C¯¹₁ , is put…

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Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.34 kg sample…

A: Mol= weight/ molar mass  first find the moles in 0.34kg