Unit 6-7 review ii

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🧪 INSTRUCTIONS:
1) First, complete the Lab Report(s) posted in Google Classroom
2) Then work to complete the Unit 6-7 Exam Review II (below)
3) Screenshot your name + score to the Google Classroom assignment when finish.
4) See Code: CharlesHelp, Pressure123 or PercentError for extra help.
5) Do not right click, use Ctrl, or Alt keys combinations

Unit 6-7 Exam Review II

Pressure: 1 atm = 101,325 Pa = 101.325 kPa = 14.7 psi = 760 mm Hg = 760 torr
Charles’s Law: V1 / T1 = V2 / T2   •   Kelvin = °C + 273  

1) Pressure Conversions (Dimensional Analysis)

Build a conversion factor that cancels the given unit and leaves the target unit.

• Write the given as: given × factor
• Place the given unit opposite so it cancels.
• Example: 1,000 Pa / 1 kPa converts kPa → Pa
• Your final unit should match the target unit exactly.

2) Charles’s Law Formula + How to Solve

Use Charles’s Law when pressure stays constant: V1 / T1 = V2 / T2

• Solve for V2: V2 = V1 × (T2 / T1)
• Solve for V1: V1 = V2 × (T1 / T2)
• Solve for T2: T2 = T1 × (V2 / V1)
• Solve for T1: T1 = T2 × (V1 / V2)

3) Temperature Rule

Always convert Celsius to Kelvin before using Charles’s Law: K = °C + 273

• Convert both T1 and T2 to Kelvin first.
• If the problem asks for a temperature, answer in the requested unit.
• At the same pressure, higher temperature should usually mean larger volume.

4) Theoretical vs Experimental

• Theoretical = what the equation predicts
• Experimental = what was actually measured
• Difference = |theoretical − experimental|
• Percent Error = (Difference ÷ theoretical) × 100

5) Percent Error Help

• First find the difference: |experimental − theoretical|
• Then divide by the theoretical value.
• Last, multiply by 100 to change it to a percent.
• Formula: (|experimental − theoretical| ÷ theoretical) × 100
• Use absolute value so the difference is always positive.

Name

Student ID

Per. -- 2nd 3rd 4th 5th 6th

Begin

This run gives 20 questions total: 5 pressure conversion train-track questions, 7 Charles’s Law input questions (1 solve for V1, 1 solve for T1, 1 solve for T2, 2 solve for V2, and 2 theoretical/experimental percent-error questions), and 8 vocabulary / concept multiple-choice questions.

Score appears only at the end. Students should screenshot their name + final score and upload it to the posted Google Classroom assignment.

Student:   Points: --

 

Question text.

End in --

Tip: build one factor that cancels the given unit.

Given

Conversion Factor

Answer

Possible points: 3 → factor numerator + factor denominator + final answer.

Type your answer

Experiment Data Chart

Temps shown in °C (convert to K)

Data	V1 (mL)	T1 (°C)	T2 (°C)	Experimental V2 (mL)
Measured

A) Theoretical V2 (mL) — whole number

B) Difference (mL) — |theory − experimental|

C) Percent Error (%) — one decimal OK

Submit

Unit 6-7 Review II Complete

Student:  

Final Score

0%

Screenshot + Upload

Take a screenshot of this page and upload it to the posted Google Classroom assignment.

Score ID:

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Click here for Screenshot

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