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PH101 HW Gas

# PH101 HW Gas - This print-out should have 12 questions...

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This print-out should have 12 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points The coldest temperature possible is - 273 de- grees Celsius, which is called absolute zero. What is this temperature in degrees ±ahrenheit? 1. - 119 . 667 ± 2. - 459 . 4 ± correct 3. 0 ± 4. +523 . 4 ± 5. - 32 ± 6. 32 ± 7. - 523 . 4 ± 8. - 491 . 4 ± 9. +459 . 4 ± 10. +491 . 4 ± Explanation: Let : T C = - 273 C . T F = 9 5 T C +32= 9 5 ( - 273 C) + 32 = - 459 . 4 ± . 002 (part 1 oF 2) 10.0 points The lowest outdoor temperature ever recorded on Earth was - 128 . 6 ±, recorded at Vostok Station, Antarctica, in 1983. What is this temperature on the Celsius scale? Correct answer: - 89 . 2222 C. Explanation: Let : T F = - 128 . 6 ± . T C = 5 9 ( T F - 32) = 5 9 ( - 128 . 6 ± - 32) = - 89 . 2222 C . 003 (part 2 oF 2) 10.0 points What is this temperature on the Kelvin scale? Correct answer: 183 . 928 K. Explanation: T = T C +273 . 15 = - 89 . 2222 C+273 . 15 = 183 . 928 K . 004 10.0 points At what ±ahrenheit temperature are the Kelvin and ±ahrenheit temperatures numeri- cally equal? Correct answer: 574 . 65 ±. Explanation: Basic Concepts: T F = 9 5 T C +32 T C = T - 273 . 15 Solution: Let x = T F = T T C = 5 9 ( x - 32) and T C = x - 273 . 15 , so 5 9 ( x - 32) = x - 273 . 15 - 4 9 x = 5 9 (32) - 273 . 15 x = - 9 4 ± 5 9 (32) - 273 . 15 ² =574 . 65 ± and 574 . 65 ±=574 . 65 K

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PH101 HW Gas - This print-out should have 12 questions...

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