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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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
Transcribed Image Text:Use the data below to calculate the total heat in kJ needed for the following processés.
melting point at 1 atm
specific heat of liquid sodium 1.38 J/g°C
97.80°C
specific heat of solid sodium 1.23 J/g°C
AHfus
2.60 kJ/mol
Provide the numerical answer without units to the correct significant figures and in a 'non-exponential form, i.e., in a
form where the exponent is zero and therefore not shown. For example, 0.444 rather than 4.44 x 101.
1. The energy in kJ needed to heat 20.00 g of solid sodium (22.99 g/mol) at -5.00°C to solid sodium at 97.80°C when
the atmospheric pressure is 1 atm.
2. The energy in kJ needed to heat 20.00g of solid sodium (22.99 g/mol) at 97.80°C to liquid sodium at 97.80°C when
the atmospheric pressure is 1 atm.
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