Experiments were done on a certain pure substance X to determine some of its properties. There's a description of each experiment in the table below. In each case, decide whether the property measured was a chemical or physical property of X, if you can. If you don't have enough information to decide, choose can't decide in the third column.
Experiments were done on a certain pure substance X to determine some of its properties. There's a description of each experiment in the table below. In each case, decide whether the property measured was a chemical or physical property of X, if you can. If you don't have enough information to decide, choose can't decide in the third column.
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Experiments were done on a certain pure substance X to determine some of its properties. There's a description of each experiment in the table below. In each case, decide whether the property measured was a chemical or physical property of X, if you can. If you don't have enough information to decide, choose can't decide in the third column.
![**Experiments Evaluating Physical and Chemical Properties**
The table below outlines three distinct experiments designed to measure specific properties of a sample (denoted as X). For each experiment, the type of process involved (physical or chemical) is to be determined.
| **Property** | **Experiment** | **Physical or Chemical?** |
|--------------|----------------|---------------------------|
| **H** | A sample of X is carefully weighed and put inside a sealed calorimeter. The calorimeter is heated electrically, and the amount of heat added is determined by monitoring the electrical current used. The temperature of X is carefully measured, and from the temperature change and the amount of heat added, the value of H may be calculated. | - [x] physical <br> - [ ] chemical <br> - [ ] (can't decide) |
| **Q** | A sample of solid X is carefully weighed and put inside a sealed flask. Pure hydrogen gas is added to the flask, and the mixture is heated until the hydrogen starts being consumed. After hydrogen stops being consumed, the contents of the flask are removed and weighed, and from the increase in weight, the value of Q may be calculated. | - [ ] physical <br> - [x] chemical <br> - [ ] (can't decide) |
| **E** | A thin sample of X is put between metal plates. A radio-frequency electric current is applied to the plates and passes through the sample. From the measured voltage across the plates, the value of E may be calculated. | - [x] physical <br> - [ ] chemical <br> - [ ] (can't decide) |
### Detailed Explanation:
1. **Experiment for Property H:**
- Description: A calorimetric experiment where the sample X is heated, and the heat transfer to the sample is measured.
- Determination: This process involves changes in temperature without altering the chemical composition of the sample, indicating it is a physical process.
2. **Experiment for Property Q:**
- Description: A reaction in a sealed flask where hydrogen gas reacts with the sample X, with subsequent measurement of the increase in weight.
- Determination: The reaction between hydrogen and sample X implies a change in chemical composition, categorizing it as a chemical process.
3. **Experiment for Property E:**
- Description: A measurement involving a radio-frequency electric current passed through a thin sample X placed between metal plates](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F51b34f29-cbe3-4c89-9d0f-09194701947f%2F6669cfdc-39f2-4445-84e4-f353e41355fb%2Fanpdh6.jpeg&w=3840&q=75)
Transcribed Image Text:**Experiments Evaluating Physical and Chemical Properties**
The table below outlines three distinct experiments designed to measure specific properties of a sample (denoted as X). For each experiment, the type of process involved (physical or chemical) is to be determined.
| **Property** | **Experiment** | **Physical or Chemical?** |
|--------------|----------------|---------------------------|
| **H** | A sample of X is carefully weighed and put inside a sealed calorimeter. The calorimeter is heated electrically, and the amount of heat added is determined by monitoring the electrical current used. The temperature of X is carefully measured, and from the temperature change and the amount of heat added, the value of H may be calculated. | - [x] physical <br> - [ ] chemical <br> - [ ] (can't decide) |
| **Q** | A sample of solid X is carefully weighed and put inside a sealed flask. Pure hydrogen gas is added to the flask, and the mixture is heated until the hydrogen starts being consumed. After hydrogen stops being consumed, the contents of the flask are removed and weighed, and from the increase in weight, the value of Q may be calculated. | - [ ] physical <br> - [x] chemical <br> - [ ] (can't decide) |
| **E** | A thin sample of X is put between metal plates. A radio-frequency electric current is applied to the plates and passes through the sample. From the measured voltage across the plates, the value of E may be calculated. | - [x] physical <br> - [ ] chemical <br> - [ ] (can't decide) |
### Detailed Explanation:
1. **Experiment for Property H:**
- Description: A calorimetric experiment where the sample X is heated, and the heat transfer to the sample is measured.
- Determination: This process involves changes in temperature without altering the chemical composition of the sample, indicating it is a physical process.
2. **Experiment for Property Q:**
- Description: A reaction in a sealed flask where hydrogen gas reacts with the sample X, with subsequent measurement of the increase in weight.
- Determination: The reaction between hydrogen and sample X implies a change in chemical composition, categorizing it as a chemical process.
3. **Experiment for Property E:**
- Description: A measurement involving a radio-frequency electric current passed through a thin sample X placed between metal plates
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