Calculate the Energy Released in Joules When One Mole of Polonium-214

question 59

Multiple Choice

Calculate the energy released in joules when one mole of polonium-214 decays according to the equation Po Pb + He. [Atomic masses: Pb-210 = 209.98284 amu, Po-214 = 213.99519 amu, He-4 = 4.00260 amu.]

• A)8.78 × 10¹⁴ J/mol
• B)7.2 × 10¹⁴ J/mol
• C)8.78 × 10¹¹ J/mol
• D)-9.75 × 10^-3 J/mol
• E)1.46 × 10^-9 J/mol

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Definitions:

Raceway

An enclosed conduit that forms a physical pathway for electrical wiring to be protected and routed through a building or structure.

Ambient Temperature

The temperature of the air or environment surrounding a device or circuit.

Table 310.15(B)(16)

A reference table in the National Electrical Code (NEC) that provides the allowable ampacities of insulated conductors of different sizes and types under various conditions.

Correction Factor

As pertaining to conductors, the de-rating of the current capacity of conductors due to ambient temperature.