calculate the heat transferred, q surr using equation 5. specific heat of the water = 4.184 j/g c
Posted: Fri Apr 29, 2022 2:08 pm
calculate the heat transferred, q surr using equation 5. specific heat of the water = 4.184 j/g c
www. 28 calitate ... de antes podem estate using liquation (? 10 ..
IMENT When 14.00 g of anhydrous sodium acetate was dissolved in 100.0 ml of water, the fol- lowing time-temperature data were collected. 8 31 30 29 o . 28 27 5 Temperature, °C 26 25 24 . 23 22 0 2 4 6 8 10 12 14 16 8 Time, minutes FIGURE 1 Time-temperature plot.
KOHLS Macbook Pro il W E R T Y U TH 1 perdut temperature content is the the turto alimentare howed by neartreng vertical the terature better with other are extrapted to the Temperature where the represent the truth water mange the line of The inter..) is were the place the line of sing on how the contenere Ar- See als petive, the reaction there and heat was read by yumm Wate in the surrounding and there. The sofwateriale lated from the womed water used and the density of water at the intenperature Tate The best transferred felis, Equations (malo pichet of water Ve HTC) 153 Sittee heat is flowing from the system to the surroundings. we get Equation (6) a system -Surrounding Uning liquation (6) and assuming that there is light heat transferred to the colle cups. the enthalpy changes from quation (2) is calculated into 17 AN moles of solut, mol This is now converted into units utk meland used to calculate All CHEMISES
23 22 21 20 0 2 10 FIGURE 1 12 14 Time, minutes 16 Temperature data. In Figure 1 temperature is on the y-axis and time is on the x-axis. The starting tempera- tures follow a linear trend and then there is a break at the time of mixing followed by linear trending ending temperatures. A vertical line is drawn at the time of mixing. The temperatures before and after mixing are fit with linear best-fit lines. The best fit lines are extrapolated to the line of mixing. The initial temperature (T...) is where the line representing the temperature of the water prior to mixing crosses the line of mixing The final temperature (...) is found where the upper linear fit line crosses the line of mixing. Equation (4) shows the calculation of the change in temperature. AT = Trimat - Timissat (4) Since At is positive, the reaction is exothermic and heat was released by system. Water is in the surroundings and absorbs the heat from the system. The mass of water is calcu- lated from the volume of water used and the density of water at the initial temperature (Table 1). The heat transferred (q) is shown in, Equation (5). (5) Curr = (mass of H,0,g) (specific heat of water, 1/8°C)(AT, °C) Since heat is flowing from the system to the surroundings, we get Equation (6). (6) q system =- surroundings Using Equation (6) and assuming that there is negligible heat transferred to the coffee cups, the enthalpy changes from Equation (2) is calculated in Equation (7). Guysel (7) ΔΗ, - moles of solute, mol This is now converted into units of k) mol' and used to calculate AH. CHEM 111 18
LABORATORY 14 ENTHALPY OF HYDRATION 6. Calculate the heat transferred, surr, using Equation (5). Specific heat of the water = 4.184J/gºC. = 7. Calculate y from Equation (6). 8. Calculate the number of mole of anhydrous sodium acetate 82.03 g/mol. molar mass = 9. Calculate Hydration for anhydrous sodium acetate using Equation (7). 10. A Hydration in units of kj/mol.
IMENT When 14.00 g of anhydrous sodium acetate was dissolved in 100.0 ml of water, the fol- lowing time-temperature data were collected. 31 30 . 29 . 28 . . 27 5 Temperature, °C 26 25 24 . . 23 22 0 2 4 6 co 10 12 14 16 8 Time, minutes FIGURE 1 Time-temperature plot.
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IMENT When 14.00 g of anhydrous sodium acetate was dissolved in 100.0 ml of water, the fol- lowing time-temperature data were collected. 8 31 30 29 o . 28 27 5 Temperature, °C 26 25 24 . 23 22 0 2 4 6 8 10 12 14 16 8 Time, minutes FIGURE 1 Time-temperature plot.
KOHLS Macbook Pro il W E R T Y U TH 1 perdut temperature content is the the turto alimentare howed by neartreng vertical the terature better with other are extrapted to the Temperature where the represent the truth water mange the line of The inter..) is were the place the line of sing on how the contenere Ar- See als petive, the reaction there and heat was read by yumm Wate in the surrounding and there. The sofwateriale lated from the womed water used and the density of water at the intenperature Tate The best transferred felis, Equations (malo pichet of water Ve HTC) 153 Sittee heat is flowing from the system to the surroundings. we get Equation (6) a system -Surrounding Uning liquation (6) and assuming that there is light heat transferred to the colle cups. the enthalpy changes from quation (2) is calculated into 17 AN moles of solut, mol This is now converted into units utk meland used to calculate All CHEMISES
23 22 21 20 0 2 10 FIGURE 1 12 14 Time, minutes 16 Temperature data. In Figure 1 temperature is on the y-axis and time is on the x-axis. The starting tempera- tures follow a linear trend and then there is a break at the time of mixing followed by linear trending ending temperatures. A vertical line is drawn at the time of mixing. The temperatures before and after mixing are fit with linear best-fit lines. The best fit lines are extrapolated to the line of mixing. The initial temperature (T...) is where the line representing the temperature of the water prior to mixing crosses the line of mixing The final temperature (...) is found where the upper linear fit line crosses the line of mixing. Equation (4) shows the calculation of the change in temperature. AT = Trimat - Timissat (4) Since At is positive, the reaction is exothermic and heat was released by system. Water is in the surroundings and absorbs the heat from the system. The mass of water is calcu- lated from the volume of water used and the density of water at the initial temperature (Table 1). The heat transferred (q) is shown in, Equation (5). (5) Curr = (mass of H,0,g) (specific heat of water, 1/8°C)(AT, °C) Since heat is flowing from the system to the surroundings, we get Equation (6). (6) q system =- surroundings Using Equation (6) and assuming that there is negligible heat transferred to the coffee cups, the enthalpy changes from Equation (2) is calculated in Equation (7). Guysel (7) ΔΗ, - moles of solute, mol This is now converted into units of k) mol' and used to calculate AH. CHEM 111 18
LABORATORY 14 ENTHALPY OF HYDRATION 6. Calculate the heat transferred, surr, using Equation (5). Specific heat of the water = 4.184J/gºC. = 7. Calculate y from Equation (6). 8. Calculate the number of mole of anhydrous sodium acetate 82.03 g/mol. molar mass = 9. Calculate Hydration for anhydrous sodium acetate using Equation (7). 10. A Hydration in units of kj/mol.
IMENT When 14.00 g of anhydrous sodium acetate was dissolved in 100.0 ml of water, the fol- lowing time-temperature data were collected. 31 30 . 29 . 28 . . 27 5 Temperature, °C 26 25 24 . . 23 22 0 2 4 6 co 10 12 14 16 8 Time, minutes FIGURE 1 Time-temperature plot.