Two Kilograms of Water at 100°C Is Converted to Steam

question 28

Multiple Choice

Two kilograms of water at 100°C is converted to steam at 1 atm. Find the change in internal energy (in J) . (L_v = 2.26 × 10⁶ J/kg.)

• A) 2.1 × 10⁴
• B) 4.5 × 10⁶
• C) 3.4 × 10⁵
• D) 4.2 × 10⁶
• E) 2.1 × 10⁶

---

Definitions:

Cl-Cl Bond

A covalent bond between two chlorine atoms, often found in molecular chlorine (Cl2).

Non-polar Covalent

A type of chemical bond where two atoms share a pair of electrons with each other equally, resulting in no charge separation across the bond.

N-Br Bond

A chemical bond formed between nitrogen (N) and bromine (Br) atoms, often found in organic compounds such as amine-bromine derivatives.

Polar Covalent

A type of chemical bond where a pair of electrons is unequally shared between two atoms, leading to a distribution of electric charge more concentrated around one atom.