Use the data below to calculate the total heat in kJ needed for the following processés.melting point at 1 atmspecific heat of liquid sodium 1.38 J/g°C97.80°Cspecific heat of solid sodium 1.23 J/g°CAHfus2.60 kJ/molProvide the numerical answer without units to the correct significant figures and in a 'non-exponential form, i.e., in aform 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 whenthe 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 whenthe atmospheric pressure is 1 atm.

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Chemistry

10th Edition

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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Energy cannot be created nor destroyed, but it can be transferred between a system and its surroundings. The change in internal energy, AU, is positive if the system absorbs energy, and it is negative if the system releases energy. (Figure 1) The total change in internal energy is the sum of the heat, q, and work, w: AU=q+w. igure AU Allgyntem >0 Al system ▼ Part A Classify the following by the sign of AU for the system. Drag the appropriate items to their respective bins. If no definitive classification can be made, drag the item into the bin labeled "Not enough data." ▸ View Available Hint(s) Negative The system expands and the surroundings get hotter Submit ✓ Correct Part B Submit Previous Answers AU- Value Provide Feedback Positive μA The system contracts and the surroundings get colder. A gaseous reaction occurs at a constant pressure of 30.0 atm and releases 57.1 kJ of heat. Before the reaction, the volume of the system was 6.80 L. After the reaction, the volume of the system…
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