Exp.2 Time-resolved Thermal Lens Calorimetry
- 최초 등록일
- 2022.06.02
- 최종 저작일
- 2022.04
- 11페이지/ MS 워드
- 가격 2,500원
소개글
"Exp.2 Time-resolved Thermal Lens Calorimetry"에 대한 내용입니다.
목차
1. Abstract
2. Introduction
3. Experimental methods
4. Results and discussion
5. Conclusions
본문내용
Abstract
In this experiment, we use an optical system of He-Ne laser beam and a computer program to find the heat capacity and molar absorptivity of solutions. Since the solution contains solute, a thermal lens effect occurs, and the oscilloscope displays a decreasing light intensity over time. The heat capacity for methanol is 203.60J/molK in both solutions. The heat capacity of acetone is 142.51J/molK and 238.68J/molK with malachite green oxalate and azulene respectively. The molar absorptivity of azulene in methanol is 0.547cm-1M-1 while the molar absorptivity of azulene in acetone is 0.383cm-1M-1.
Introduction
When studying the reaction between matter and the energy radiated by the reaction, we rely on spectroscopy. It is effective in analyzing and investigating molecular structures and dynamics since each atom or molecule displays a distinctive spectrum. There are five major types of spectroscopy including Infrared spectroscopy, Ultraviolet-Visible spectroscopy, Nuclear Magnetic Resonance spectroscopy, Raman Spectroscopy, and X-Ray spectroscopy.
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