1 atm, how much energy is required to heat 61.0 g H,O(s) at -10.0 °C to H,O(g) at 119.0 °C? Use the heat transfer nstants found in this table.
1 atm, how much energy is required to heat 61.0 g H,O(s) at -10.0 °C to H,O(g) at 119.0 °C? Use the heat transfer nstants found in this table.
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:At 1 atm, how much energy is required to heat 61.0 g H,O(s) at – 10.0 °C to H,O(g) at 119.0 °C? Use the heat transfer
constants found in this table.
kJ
Expert Solution
Step 1
The process is carried in 5 stages
To heat ice from -10° to 0° C
Q = mc∆T
= 61×2.087× 10
= 1273.07 J
2) To melt the ice at 0°C to water at 0°C.
Q = m x Enthalpy of fusion
= 61 g x 333.6 J/g
= 20349.6 J
Q = 20349.6 J
3) To heat the water from 0°C to boiling at 100°C
Q = mcdT where c = specific heat of water , dT = 100°C
= 61 g x 4.184 J/g/°C x 100°C
= 25522.4 J
Q = 25522.4 J
4) To vaporize the water to steam at 100°C
Q = m x Enthalpy of vaporization
= 61 g x 2257 J/g
= 137677 J
Q = 137677 J.
5)
) To heat the steam from 100°C to 119°C
Q = mcdT where c = specific heat of gaseous H2O (steam) , dT = 19°C
= 61 g x 2.000 J/g/°C x 100°C
= 2318 J
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