Advance Study Assignment: Heat Effects and Calorimetry 1. A metal sample weighing 147.90 g and at a temperature of 99.5°C was placed in 49.73 g of water in a calo- rimeter at 23.0°C. At equilibrium the temperature of the water and metal was 41.8°C. a. What was Ar for the water? (Ar final initial) 41.8°C - 230°C℃ b. What was Ar for the metal? 41.8-995 d. Calculate the specific heat of the metal, using Equation 3. 94₂0=8H₂₂ M₁₂₂ Ato = - SH m Mm Atm 9-4.18)(147.90)(-577) c. How much heat flowed into the water? (Take the specific heat of the water to be 4.18 J/g °C.) SH.M.LT > (4.188) (49.738) (18.88) e. What is the approximate molar mass of the metal? (Use Eq. 4.) 25 25 MM-3716°C) (55,6714) = 0007008 a. b. Calculate quo, using Equation 1. 18,8 0 Why? -57.7 c c. Find AH for the reaction as it occurred in the calorimeter (Eq. 5). 3908 7.01x10 2. When 4.98 g of NaOH was dissolved in 49.72 g of water in a calorimeter at 23.7°C, the temperature of the solution went up to 50.1°C. Is this dissolution reaction exothermic?, 35,6714 joules joules/g°C 24 g/mol joules
Advance Study Assignment: Heat Effects and Calorimetry 1. A metal sample weighing 147.90 g and at a temperature of 99.5°C was placed in 49.73 g of water in a calo- rimeter at 23.0°C. At equilibrium the temperature of the water and metal was 41.8°C. a. What was Ar for the water? (Ar final initial) 41.8°C - 230°C℃ b. What was Ar for the metal? 41.8-995 d. Calculate the specific heat of the metal, using Equation 3. 94₂0=8H₂₂ M₁₂₂ Ato = - SH m Mm Atm 9-4.18)(147.90)(-577) c. How much heat flowed into the water? (Take the specific heat of the water to be 4.18 J/g °C.) SH.M.LT > (4.188) (49.738) (18.88) e. What is the approximate molar mass of the metal? (Use Eq. 4.) 25 25 MM-3716°C) (55,6714) = 0007008 a. b. Calculate quo, using Equation 1. 18,8 0 Why? -57.7 c c. Find AH for the reaction as it occurred in the calorimeter (Eq. 5). 3908 7.01x10 2. When 4.98 g of NaOH was dissolved in 49.72 g of water in a calorimeter at 23.7°C, the temperature of the solution went up to 50.1°C. Is this dissolution reaction exothermic?, 35,6714 joules joules/g°C 24 g/mol joules
Chemistry for Engineering Students
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Chapter9: Energy And Chemistry
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
Transcribed Image Text:Experiment 14
Advance Study Assignment: Heat Effects and Calorimetry
1. A metal sample weighing 147.90 g and at a temperature of 99.5°C was placed in 49.73 g of water in a calo-
rimeter at 23.0°C. At equilibrium the temperature the water and metal was 41.8°C.
What was Ar for the water? (At=final initial)
41.8°C - 250°C
a.
b. What was Ar for the metal?
418-995
d. Calculate the specific heat of the metal, using Equation 3.
94-₂0=8H₂₂₂ Ato = - SH m Mm Atm
9-4.18)(147.90)(-577)
e. What is the approximate molar mass of the metal? (Use Eq. 4.)
25
MM-SH5C) (55,6714) = 0007008
नाम)
How much heat flowed into the water? (Take the specific heat of the water to be 4.18 J/g °C.)
9=SH; MART ⇒ (4,18³) (49.73.8) (18.88)
S
b. Calculate 20, using Equation 1.
Why?
18,8
c. Find AH for the reaction as it occurred in the calorimeter (Eq. 5).
AH
-577 d
°C
°C
3908
-4
g/mol
2. When 4.98 g of NaOH was dissolved in 49.72 g of water in a calorimeter at 23.7°C, the temperature of the
solution went up to 50.1°C.
a. Is this dissolution reaction exothermic?
joules
35,671.4 joules/g c
C
7.01 X10
joules
ioulas
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