얼음의 융해 엔탈피

얼음을 녹이는 데 필요한 에너지 측정하기

Thermochemistry Beginner (Middle School) 25 분 ~$3.00

목표

알려진 질량의 얼음을 따뜻한 물에 넣고 온도 변화를 측정하여 얼음의 융해 엔탈피를 결정한다.

배경

When ice melts, it absorbs energy from its surroundings without changing temperature (latent heat). By adding ice to warm water in a calorimeter and measuring the final temperature, the enthalpy of fusion can be calculated. The accepted value is 6.01 kJ/mol (334 J/g).

안전 경고

  • Handle warm water with care
  • Dry ice before weighing to avoid extra water mass

필수 개인 보호 장비

goggles

재료

  • Ice cubes (50 g)
    From distilled water preferred
  • Warm water (100 mL)
    About 40°C

장비

Polystyrene cup calorimeter Thermometer Analytical balance Paper towels

실험 절차

1

Add 100 mL of warm water (~40°C) to the calorimeter. Record exact temperature and mass.

3 분
2

Quickly dry ice cubes with paper towel and weigh them. Record mass.

2 분
3

Add the ice to the warm water. Stir gently until all ice melts.

5 분
4

Record the final equilibrium temperature.

2 분
5

Set up the equation: heat lost by warm water = heat to melt ice + heat to warm melted ice to final T.

3 분
6

Solve for ΔHfus. Convert to kJ/mol (multiply by 18.015 g/mol). Compare with 6.01 kJ/mol.

5 분

예상 결과

The final temperature should be around 10-15°C. Calculated ΔHfus should be approximately 280-350 J/g (accepted: 334 J/g or 6.01 kJ/mol).

정리

Pour water down the drain. Dry the calorimeter.

세부 정보

카테고리
Thermochemistry
난이도
Beginner (Middle School)
소요 시간
25 분
예상 비용
$3.00
단계
6
재료
2

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아세트산나트륨의 발열 결정화 30 min 마그네슘의 연소열 50 min 금속의 비열 용량 40 min 커피컵 열량 측정 40 min 헤스의 법칙 검증 60 min 용해는 항상 발열이 아니다 25 min 냉찜질 팩의 화학 원리 20 min 폭탄 열량계 시뮬레이션 45 min 흡열 반응 실험 20 min

Frequently Asked Questions

What is the objective of 얼음의 융해 엔탈피?
알려진 질량의 얼음을 따뜻한 물에 넣고 온도 변화를 측정하여 얼음의 융해 엔탈피를 결정한다.
How difficult is 얼음의 융해 엔탈피?
This experiment is rated as Beginner (Middle School). It takes approximately 25 minutes to complete.
What safety precautions are needed for 얼음의 융해 엔탈피?
Key safety precautions include: Handle warm water with care; Dry ice before weighing to avoid extra water mass.
What materials are needed for 얼음의 융해 엔탈피?
The main materials required are: Ice cubes, Warm water.
What results should I expect from 얼음의 융해 엔탈피?
The final temperature should be around 10-15°C. Calculated ΔHfus should be approximately 280-350 J/g (accepted: 334 J/g or 6.01 kJ/mol).