A 400-G Block of Ice at -15

question 67

Multiple Choice

A 40.0-g block of ice at -15.00°C is dropped into a calorimeter (of negligible heat capacity) containing water at 15.00°C.When equilibrium is reached,the final temperature is 8.00°C.How much water did the calorimeter contain initially? The specific heat of ice is 2090 J/kg ∙ K,that of water is 4186 J/kg ∙ K,and the latent heat of fusion of water is 33.5 × 10⁴ J/kg.

• A)302 g
• B)345 g
• C)405 g
• D)546 g
• E)634 g

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Definitions:

Triplet

In spectroscopy, a pattern of three closely spaced spectral lines or signals, often due to splitting in NMR or EPR spectroscopy caused by spin-spin coupling.

Signals

Manifestations or indicators that convey information or data, especially within the context of communication systems or analytical instrumentation.

Diastereotopic

Describes hydrogen atoms or groups in a molecule that are not equivalent in the three-dimensional structure, leading to different stereochemical outcomes.

Enantiotopic

Refers to two atoms or groups in a molecule that are mirror images of each other and can produce enantiomers upon substitution.