Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Question
Chapter 4, Problem 4.47P
(a)
To determine
To Calculate: The Specific activity of Rn-222
(b)
To determine
To Calculate: The weight of 4-pCi Rn-222.
(c)
To determine
To Calculate: The quantity (in moles) of the Rn gas in 1L
(d)
To determine
To Calculate: The number of moles of air in 1L
(e)
To determine
To Calculate: The volumetric percent of 4-pCi Rn-222 in 1L at 250C and 760 mmHg.
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Problem II
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End
A temperature rise of 3.10 ± 0.20 °C was measured when a reaction was carried out in a calorimeter with a heat capacity of 0.841 ± 0.014 kJ °C -1 .The enthalpy change (Δ H ) was worked out as -2.61 kJ by using the equation:Enthalpy change (Δ H ) = heat capacity ( c ) × temperature change ( T )What is the root-squared error (in kJ) for Δ H ?Quote your answer to two decimal places.When you submit your answer, do NOT include units.(The minus sign in front of the enthalpy change indicates that the reaction is exothermic; don't include it in your calculation.)
Chapter 4 Solutions
Introduction To Health Physics
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