The Enthalpy Change for Converting 10

question 94

Multiple Choice

The enthalpy change for converting 10.0 g of ice at -25.0°C to water at 80.0°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)6.16
• C)3870
• D)7.21
• E)9.88

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Definitions:

Distal Convoluted Tubule

A portion of the nephron in the kidney where the final adjustments in urine composition are made, involving selective reabsorption and secretion.

Nephron Loop

A U-shaped part of the nephron in the kidney that extends from the proximal to the distal convoluted tubule, playing a crucial role in concentrating urine and conserving water.

Marginal Subcontracting Cost

The additional cost incurred for outsourcing a unit of production or service beyond the regular capacity or capability of the business.

Layoff Cost

The expenses associated with terminating employees, including severance pay, benefits continuation, and costs associated with changing the workforce.