A 400-G Block of Iron at 400°C Is Dropped into a Calorimeter

question 49

Multiple Choice

A 400-g block of iron at 400°C is dropped into a calorimeter (of negligible heat capacity) containing 60 g of water at 30°C.How much steam is produced? The latent heat of vaporization of water is 22.6 × 10⁵ J/kg and its specific heat capacity is 4186 J/kg ∙ K.The average specific heat of iron over this temperature range is 560 J/kg ∙ K.

• A)22 g
• B)33 g
• C)42 g
• D)54 g
• E)59 g

Identify key events and their impact on the labor movement in the United States.

Distinguish between different types of labor unions (craft, industrial, uplift, etc.).

Comprehend the evolution of labor rights and conditions from the early years of US history.

Analyze the role of labor unions in addressing workers' rights and social justice.

---

Definitions:

Carbene

A highly reactive molecule featuring a carbon atom with two non-bonded electrons and six valence electrons in total.

Carbanion

An ion that contains a negatively charged carbon atom, often a reactive intermediate in organic reactions.

Hybridization

The concept in chemistry where atomic orbitals mix to form new hybrid orbitals for bonding.

Cationic Center

A site within a molecule that bears a positive charge, typically found in organometallic or organic compounds.