Mississippi Science CHE.10

CHE.10 is a cluster heading. These are the individual standards under it.

• CHE.10.1

  Enrichment: Construct explanations to explain how temperature and heat flow in terms of the motion of molecules (or atoms).

• CHE.10.2

  Enrichment: Classify chemical reactions and phase changes as exothermic or endothermic based on enthalpy values. Use a graphical representation to illustrate th...

• CHE.10.3

  Enrichment: Analyze and interpret data from energy diagrams and investigations to support claims that the amount of energy released or absorbed during a chemica...

• CHE.10.4

  Enrichment: Use mathematical and computational thinking to solve problems involving heat flow and temperature changes, using known values of specific heat and l...

01

What Students Need to Do

Students connect temperature to particle motion and track where heat flows. They use energy diagrams and bond energy data to identify reactions and phase changes that absorb or release heat. They calculate heat using mass, specific heat, temperature change, or latent heat.

02

What Mastery Looks Like

A student can read a negative enthalpy change as heat released and explain it using the energy needed to break bonds and the energy released when bonds form. They know melting ice can absorb heat while its temperature stays steady. They choose q = mcΔT for warming and q = mL for melting, then give answers with units.

03

Common Misconceptions

Students often think breaking bonds releases energy, when it requires energy. They may assume melting ice cannot absorb heat until its temperature rises. Some read a negative enthalpy change as heat absorbed.

04

How to Assess It

Exit ticket: A 20 g water sample warms from 20°C to 25°C. Using a specific heat of 4.18 J/g°C, find the heat gained and explain what happened to particle motion.

1. 01

   Place ice and water in a cup, stir, record the temperature every minute until the ice melts, and graph the results.

2. 02

   Give pairs a reaction energy diagram and bond energy totals; ask them to explain where the heat goes using both.

3. 03

   Deal cards with mass and either specific heat and temperature change or latent heat; students calculate heat and sort by gained or lost.

4. 04

   Activate a hand warmer and instant cold pack; measure each temperature before and after, then explain which absorbs heat.

• CHE.9

  Enrichment: Students will understand the nature and properties of acids, bases, and salt solutions.

• CHE.11

  Enrichment: Students will understand that chemical equilibrium is a dynamic process at the molecular level.

• PHS.7

  Students will examine different forms of energy and energy transformations.