Endothermic Reactions: Energy Absorption Basics

Steps:

• Identify endothermic reactions as those absorbing heat from surroundings, increasing system energy.
• Recall ΔH > 0 for endothermic processes per enthalpy definition.
• Evaluate statements: Assume 1 states energy absorbed (correct); 2 states heat released (incorrect for endothermic); 3 states bonds broken require energy (correct); 4 states reaction feels cold (but actually surroundings cool, system warms—ambiguous without full text).
• Select option matching correct statements 1 and 3.

Why A is correct:

• A pairs statements 1 (energy absorbed, ΔH positive) and 3 (energy input for bond breaking), aligning with endothermic definition.

Why the others are wrong:

• B includes 4, which misstates temperature effect (surroundings cool, not reaction itself).
• C includes 2, defining exothermic traits (heat release).
• D pairs two incorrect statements on energy release and temperature.

Not enough information: Full statements 1–4 missing for precise verification.

Final answer: A