Calculate the Amount of Heat Energy, in Units of Kilojoules $\degree$

question 83

Multiple Choice

Calculate the amount of heat energy, in units of kilojoules, required to convert 50.0 g of liquid ethanol, CH₃CH₂OH, at 25.5 $\degree$ C to gaseous ethanol at 92.0 $\degree$ C.(C_{ethanol liquid} = 2.44 J/g $\degree$ C; C_{ethanol gas} = 1.42 J/g $\degree$ C; molar heat of vaporization of liquid ethanol = 3.86 x 10⁴ J/mol.The boiling point of ethanol is 78.4 $\degree$ C and its molar mass is 46.07 g/mol.)

• A)49.3 kJ
• B)1.93 x 10³ kJ
• C)0.862 kJ
• D)1.35 x 10² kJ
• E)2.67 kJ

---

Definitions:

Resilience

The capacity to recover quickly from difficulties or adapt in the face of adversity.

Parkinson's Disease

A progressive neurological disorder that affects movement, causing symptoms like tremors, stiffness, and slowing of movement due to the degeneration of dopamine-producing neurons in the brain.

Impaired Thinking

A reduced capability to process information, make decisions, or solve problems, often as a result of various medical, psychological, or neurodevelopmental conditions.

Dementia

A group of symptoms affecting memory, thinking, and social abilities severely enough to interfere with daily functioning, often due to brain disease or injury.