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Chemical, there is an interaction between the different chemicals in the heat pack.
Wiki User
∙ 14y ago
Wiki User
∙ 7y agoIt is a physical change.
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How is heat transferred when a person holds a ice pack?
Heat will travel from the person's hand into the ice pack, where it will excite the molecules there and warm the ice pack.
When a cold pack is squeezed why does it feel cool to the touch?
When you activate the cold pack, you start an endothermic (heat-absorbing) process* inside it. This drops the temperature to just above freezing. The immediately surrounding air will cool down by conduction and convection. *The process is typically the dissolution of ammonium nitrate (fertilizer) in water
Does the application of heat and cold pack require a physicians order?
Yes
How is energy transferred when an instant cold pack is put on muscle injury?
Heat energy is transferred by conduction from the muscle to the cold pack.
How is the way a toaster producers thermal energy different from the way a thermal pack produces thermal energy?
From my understanding, a toaster produces its thermal energy by running electricity through a high resistance wire, and as the electricity moves through this wire, it looses energy in the form of heat. Now, depending on the type of thermal pack, it's different, but most of them work by quickly oxidizing iron (with the use of catalysts) which releases energy in the form of heat during the chemical reaction.
When you reuse a crystal heat pack is that a chemical or physical change?
physical change as no new substances have been created
When you activate an instant cold pack and water mixes with a chemical and the pack gets very cold what example is this?
It is an example of an endothermic reaction. It is absorbing heat.
When you activate an instant cold pack water mixes with a chemical and the pack gets very cold This is an example of?
its an endothermic reaction
Is the reaction inside a chemical heat pack endothermic?
The reaction is exothermic.
Why does a cold pack get cold when the chemical reacts?
A cold pack creates a endothermic reaction when the chemical reacts, which means that energy is taken from the surrounding, which makes the packaging cold. it is the opposite with a heat pack, an exothermic reaction is created which releases the energy into the surrounding creating the heat. Hope this helped.
What is a hot pack?
A device which release heat after an exothermic chemical reaction or after crystallization of a substance.
What booster pack is Assault Mode Activate in?
"Assault Mode Activate" comes in the Booster Pack known as, "Crimson Crisis".
Example how a cold pack works?
Ammonium nitrate and water are in separate compartments in the cold pack. To activate the cold pack, you break the compartments in the pack so the ammonium nitrate and water mix. The ammonium nitrate absorbs all of the heat, making the water ice cold.
How to activate sms 13 pack on bsnl prepaid connection?
How to deactivate sms 13 pack
How do activate the pack a punch machine in nazi zombies 4?
First activate the three teleports, then the pack a punch machine is active. the price is 5000 points, but that is how you get your weapons upgraded.
Does ascension have a pack a punch?
It yes, it does. You have to activate all the lunar landers, and then activate the launch by pressing the button right next to the power switch. Then go find the pack a punch.
How do get to the pack a punch on der reise?
The way to get the Pack-a-Punch on Der Reise is to activate the electricity and activate the teleporters. The teleporters provide quick escape and teleport you right in front of the open Pack-a-Punch. Ugpgrade cost 4000 points
