HS-PS1-9

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Analyze data to support the claim that the combined gas law describes the relationships among volume, pressure, and temperature for a sample of an ideal gas.

Clarification statement: Real gases may be included at conditions near STP. The relationships of the variables in the combined gas law may be described both qualitatively and quantitatively.

Assessment boundary: Assessment is limited to the relationships among the variables of the combined gas law, not the gas law names, i.e. Boyle’s Law.

Note: this is a NYSED-specific performance expectation that is different from the Next Generation Science Standards.

Performance Level Descriptions

Every Regents exam question on HS-PS1-9 is written to match one of the performance level descriptions (PLDs) below.

Level 1: Use data/information to identify the relationship between two variables in the combined gas law when the third variable and molar quantity are held constant.

Level 2: Given data, construct a mathematical representation and/or calculate the value of an unknown variable in the combined gas law when the molar quantity is held constant.

Level 3: Use data/information that provides evidence to make and/or support a claim about the relationship between two variables in the combined gas law when the third variable and molar quantity are held constant.

Level 4: Analyze data to support the claim that the combined gas law describes the relationships among volume, pressure, and temperature for a sample of an ideal gas.

Level 5: Plan and conduct an investigation to gather and analyze data that validates the claim that the combined gas law describes the relationships among volume, pressure, and temperature for a sample of an ideal gas

Resources

Examples and discussion of resources for the learning, teaching, and assessment of HS-PS1-9.

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Regents Exam Questions

Released New York State Regents exam questions that assess HS-PS1-9 are listed here by exam and question cluster. Each link opens the question with its answer key.

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NGSS Dimensions

Performance expectation HS-PS1-9 was developed using the following elements from the NRC document A Framework for K-12 Science Education:

Science and Engineering Practices

• Analyzing and interpreting data: Analyze data using tools, technologies, and/or models (e.g., computational, mathematical) in order to make valid and reliable scientific claims or determine an optimal design solution.

Disciplinary Core Ideas

• Structure and properties of matter: the concept of an ideal gas is a model to explain behavior of gases. A real gas is most like an ideal gas when the real gas is at low pressure and high temperature.

Crosscutting Concepts

• Patterns: Mathematical representations can be used to identify certain patterns.

Page contributors: Conrad Richman, Caroline Leonard

Chemistry | HS. Structure and Properties of Matter