Description
- Please convert temperature 25°C to Fahrenheit scale and Kelvin scale.
- a) How much heat is needed to warm up a 1000-g steel block from 20°C to 100 °C? (c=0.11cal/g°C)
b) How much heat is needed to warm up a 1000-g water from 20°C to 100 °C? (c=1.0 cal/g°C) - a) In a thermodynamic system, gas expends from 1 m3to 3 m3while keeping a constant pressure 5000 Pa. How much work is done by the gas?
b) During this process, if the heat flows into the system is 12000 J, what’s the internal energy change of the system?
4.Why is water always cooler than iron fence in summer?
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Homework problems: Chapter 10
1. Please convert temperature 25°C to Fahrenheit scale and Kelvin
scale.
2. a) How much heat is needed to warm up a 1000-g steel block
from 20°C to 100 °C? (c=0.11cal/g°C)
b) How much heat is needed to warm up a 1000-g water from
20°C to 100 °C? (c=1.0 cal/g°C)
3. a) In a thermodynamic system, gas expends from 1 m3 to 3 m3
while keeping a constant pressure 5000 Pa. How much work is
done by the gas?
b) During this process, if the heat flows into the system is 12000 J,
what’s the internal energy change of the system?
4. Why is water always cooler than iron fence in summer?
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Explanation & Answer
here you go. Let me know if you have questions.
1a.
𝐾 = 𝐶 + 273.15
𝐾 = 25 + 273.15
𝑲 = 𝟐𝟗𝟖. 𝟏𝟓 𝑲
1b.
9
𝐹 = 𝐶 + 32
5
9
𝐹 = ∙ 25 + 32
5
𝐹 = 45 + 32
�...
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