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Question:

How do you know the direction of heat transfer and the direction of energy transfer?

I‘m supposed to find the direction of heat transfer for the following:1. After you have a swim, water droplets on your skin evaporate.2. Two chemicals are mixed in a flask on a laboratory bench. A reaction occurs and heat is evolved.However I am supposed to find the transfers of energy and material into and out of the system for the following:3. Solid ammonium chloride is added to water in a beaker and dissolves. The beaker becomes cold to the touch.4. A bar of Monel (an alloy of nickel, copper, iron, and manganese) is heated until it melts, poured into a mold, and solidifies.I have a general idea I think the answers are 1. Heat is being transferred into the system.2. Heat is being tranferred into the system.3. System is losing energy.4. System is gaining energy.But I am not 100% sure about any of these, so some feedback or explaination would be fantastic!Thanks.

Answer:

Are you hitting the curb alot?? I tie knots in my shoes sometimes . But in a tire?? you must be very strong to tie a knot in a tire!!.(lol) could be a flaw in the tire, and should be under warrenty, if it does it again. Hmmmm an alignment may be needed
1. After you have a swim, water droplets on your skin evaporate. 1. Heat is being transferred from you into the evaporating water but the question is,,, what is the system, you that loses heat energy , or the water that gains the system is defined as whatever you are curious about. 2. Two chemicals are mixed in a flask on a laboratory bench. A reaction occurs and heat is evolved. 2. Heat is being tranferred from the chemicals into the flask other surroundings 3. Solid ammonium chloride is added to water in a beaker and dissolves. The beaker becomes cold to the touch. the ammonium chloride system is gaining energy, they are removing the energy from the surrounding water beaker the surrounding water beaker lose , while the chemical system gets 4. A bar of Monel (an alloy of nickel, copper, iron, and manganese) is heated until it melts, poured into a mold, and solidifies. the Monel system is gaining energy from the surrounding heat source, (an oven ?) then the Monel system loses that energy when it cools off solidifies
If it's a new tire it should still be under warranty. Take it back and get another one. If it does it again it may be an alignment issue.

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