The Enthalpy Change for Converting 1

question 49

Multiple Choice

The enthalpy change for converting 1.00 mol of ice at -50.0°C to water at 70.0°C is __________ kJ. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K, respectively. For H₂O, ΔH_fus = 6.01 kJ/mol, and ΔH_vap = 40.67 kJ/mol

• A)12.28
• B)6.41
• C)13.16
• D)7154
• E)9.40

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Definitions:

PTH Production

The synthesis of parathyroid hormone, a regulator of calcium and phosphate concentration in the bloodstream, controlled by the parathyroid glands.

Neuromuscular Excitability

The ability of a muscle and its corresponding nerves to respond to stimuli, crucial for muscle contraction.

Increased Osmolality

A higher concentration of solutes in a solution, leading to increased osmotic pressure and potentially affecting cellular processes and fluid balance.

Extracellular Fluid

A fluid that surrounds cells and forms part of the body's internal environment, facilitating the transport of nutrients, oxygen, and waste products.