1. A fire is heating up a pot, which is cooking food. Which part of this reaction is the chemical reaction system?
all parts combined
the food
the pot
the fire
2.Which statement correctly describes how energy transforms?
When a fire is burning, visible energy is turned into chemical energy in the form of light and thermal energy in the form of heat.
When a fire is burning, chemical energy is turned into visible energy in the form of light and thermal energy in the form of heat.
When a fire is burning, thermal energy is turned into visible energy in the form of light and chemical energy in the form of heat.
When a fire is burning, visible energy is turned into thermal energy in the form of light and chemical energy in the form of heat.
3.Is a burning fire endothermic or exothermic? How do you know?
A burning fire is endothermic because a lot of heat is given off as the wood is converted into carbon dioxide and water.
A burning fire is exothermic because a lot of heat is given off as the wood is converted into carbon dioxide and water.
A burning fire is exothermic because a lot of heat needs to be applied in the form of fire to break the bonds of the wood.
A burning fire is endothermic because a lot of heat needs to be applied in the form of fire to break the bonds of the wood.
4.Use the energy chain to answer the question.
fire heats up a pot → pot cooks food → food fuels body → body releases heat during activity
Where is energy created in this energy chain?
Starting a fire is the creation of energy.
The food cooking is the creation of energy.
Energy is never created but simply recycled and changed into other forms.
The body processing food is the creation of energy.
5.A fire is heating up a pot, which is cooking food. Which part of this reaction is the chemical reaction system?
all parts combined
the food
the pot
the fire
1. Freezing is exothermic because as water bonds into ice, the energy from bond formation is released and heats up the surrounding environment.
2. When fire is burning, chemical energy is turned into visible energy in the form of light and thermal energy in the form of heat.
3. A burning fire is exothermic because a lot of heat is given off as the wood is converted into carbon dioxide and water.
4. Energy is never created but simply recycled and changed into other forms.
5. The gasoline and spark.
These are the only answers I have, and are correct for the connexus chemistry quick check questions.
Alex is 100% correct!
2 alive so fire whats yall fav song
anyone got anything yet?
1. The chemical reaction system in this scenario is the combination of all parts combined: the fire, the pot, and the food. Chemical reactions occur when the fire interacts with the pot and the food, causing changes in their chemical composition.
To determine the chemical reaction system in this scenario, you can think about the changes that occur during the process. The fire releases heat and transfers it to the pot, which then transfers the heat to the food, causing it to cook. These heat transfers involve chemical reactions, such as the combustion reaction in the fire and the cooking reactions in the food.
2. The statement "When a fire is burning, visible energy is turned into thermal energy in the form of light and chemical energy in the form of heat" correctly describes how energy transforms.
In a burning fire, the chemical energy stored in the fuel (such as wood) is converted into thermal energy (heat) and visible energy (light). The combustion process breaks the chemical bonds in the fuel molecules, releasing energy in the form of heat and light.
3. A burning fire is exothermic because a lot of heat is given off as the wood is converted into carbon dioxide and water.
In an exothermic reaction, heat is released to the surroundings. When wood burns in a fire, it undergoes a combustion reaction with oxygen from the air. This reaction releases a large amount of heat energy, which is why a fire feels warm.
4. Energy is never created but simply recycled and changed into other forms.
According to the law of conservation of energy, energy cannot be created or destroyed; it can only be converted from one form to another. In the given energy chain, the energy is being transferred and transformed from one form to another but not created. The fire heats up the pot, the pot transfers heat to cook the food, the body processes the food for fuel, and the body releases heat during activity. Energy is transferred and transformed but not created.
5. The chemical reaction system in this scenario is the combination of all parts combined: the fire, the pot, and the food.
As mentioned previously, the fire, the pot, and the food all play a role in a chemical reaction system. The fire undergoes a combustion reaction, releasing heat and gases. The pot undergoes thermal conduction reactions, transferring heat to the food and causing it to cook. The food undergoes various chemical reactions, such as denaturation of proteins and caramelization of sugars, due to the heat from the pot and fire. Therefore, it is the combination of all parts combined that form the chemical reaction system in this scenario.
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