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Homework for chemistry for health science major

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2023/2024 Written for academic year
Institution Winston-Salem State University
Module CHE 1311
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Homework for chemistry for health science major

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1a. Sodium bicarbonate- A pure substance
1b. Water- A pure substance
1c. Blueberry muffin- A mixture
1d. Zinc- A pure substance
1e. Soft drink- A mixture

2a.Gas
2b. Solid
2c. Liquid

3a. Gasoline- Potential energy
3b. Skating- Kinetic energy
3c. A candy bar- Potential energy

4a. F= (25*9/5) +32
45+32
F= 77

4b. C= (98-32) *5/9
66*5/9
C=36.67

4c. 298k=C+273
298-273=25=C
F=(25*9/5) +32
45+32
F= 77

5. Heat= mass*SH*(t2 - t1)
45g*.897J*(76.8 -12.5)=2595.47J

6a. Heat= mass*SH*(t2 - t1)
120g*1cal*(70 - 5.5)=322.5cal
Or 322.5*4.184=1349.34J

6b. Heat= mass*SH*(t2 - t1)
10g*.240J*(275 -112)=391.2J
Or 391.2/4.184=93.55cal

7a. Heat= mass*SH*(t2 - t1)
1250g*1cal*(50.8 - 25)=32,250cal
Or 32,250/1000= 32.25kcal

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