A Backpacker Collects Snow at 0°C, and Places It in a Cooking

question 1

Multiple Choice

A backpacker collects snow at 0°C, and places it in a cooking pot on a camp stove. It takes 643 kJ of heat energy to melt the snow and bring the water to boiling. Assuming no heat loss, and neglecting the specific heat capacity of the pot, calculate the mass of snow that the backpacker collected. (Data: specific heat capacity of liquid water, c = 4.18 J/g·K; and: H₂O(s) → H₂O(l) ΔH = ΔH_fusion = 6.02 kJ/mol)

• A)1.92 kg
• B)1.90 kg
• C)1.52 kg
• D)855 g
• E)< 800 g

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Definitions:

Blood Calcium Levels

The concentration of calcium ions in the blood, essential for various bodily functions including bone formation, blood clotting, and muscle contraction.

Osteoclast Activity

Biological processes involving osteoclast cells, which break down bone tissue, facilitating bone resorption and remodeling.

Calcitonin

A hormone produced by the thyroid gland that helps regulate calcium levels in the blood by inhibiting osteoclast activity.

Broken Bone

A fracture or disruption in the continuity of a bone, often caused by trauma, stress, or disease.