Apentix/AP Chemistry/Unit 6: Thermodynamics/Question

AP Chemistryeasymcq1 pt

Specific heat capacity is defined as

A.the energy needed to raise the temperature of one gram of a substance by 1 °C

B.the total thermal energy stored in one gram of a substance

C.the energy needed to warm an entire sample by 10 °C

D.the highest temperature a substance can reach

Explanation

Core Concept

Specific heat capacity normalizes heat capacity to a per-gram basis: c = q ÷ (m × ΔT), with units of J/(g·°C). It states how much energy each gram must absorb to warm by one degree. Water's high value, 4.18 J/(g·°C), explains its use as a coolant and its moderating effect on coastal climates. Heat capacity without the 'specific' label refers to a whole object instead of one gram.

Correct Answer

Athe energy needed to raise the temperature of one gram of a substance by 1 °C

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