Based on their descriptions, classify these chemical changes as endothermic or exothermic.

Asked by maham237 @ in Chemistry viewed by 356 People

Based on their descriptions, classify these chemical changes as endothermic or exothermic.
1) A chemical change takes place in a container, making it feel cold to touch.
2) Burning wood
3) A chemical change takes place in a container, making it feel hot to touch.
4) Pocket hand warmers(used by skiers) start out at room temperature. When you open the air tight packaging, a substance reacts with air, and it quickly begins to feel hot.
5) A "cold pack" (used for sport injuries) starts out a room temperature. But when you squish the liquid around, you cause two substances to mix that were originally kept separate. Those substances react and the pack begins to feel cold.

Answered by maham237 @


_Award brainliest if helped!
1. Endothermic
2. Exothermic
3. Exothermic
4. Exothermic
5. Endothermic

(Endothermic absorbs energy (heat) from the surrounding making surrounding cooler, and vice versa for exothermic.)

Similar Questions

Classify the following as physical and chemical changes

Asked by admin @ in Science viewed by 390 persons

Classify the following as chemical or physical changes: • cutting of trees, • melting of butter in a pan, • rusting of almirah, • boiling of water to form steam, …

Classify the following as chemical or physical changes

Asked by admin @ in Science viewed by 329 persons

Classify the following as chemical or physical changes: • cutting of trees, • melting of butter in a pan, • rusting of almirah, • boiling of water to form steam, …

Classify the steps involved in the formation of a solution as being endothermic or exothermic.

Asked by maham237 @ in Biology viewed by 315 persons

Classify the steps involved in the formation of a solution as being endothermic or exothermic. separation of solute molecules separation of solvent molecules formation of solute-solvent interactions

How can you tell if a chemical change has occurred

Asked by admin @ in Chemistry viewed by 320 persons

How can you tell if a chemical change has occurred?

Are enzymes used up or changed during a chemical reaction

Asked by admin @ in Biology viewed by 341 persons

Which one of the following is true? A) Enzymes are used up in chemical reactions. B) An enzyme binds to its substrate at the enzyme's substrate site. C) An enzyme's …

Which substance cannot be broken down by a chemical change

Asked by admin @ in Chemistry viewed by 345 persons

Which substance can not be broken down by a chemical reaction? (1) ammonia (3) methane (2) argon (4) water

Why rusting of iron is a chemical change

Asked by admin @ in Chemistry viewed by 308 persons

Why is rusting of iron considered a chemical change

Why cannot a chemical change be normally reversed

Asked by admin @ in Science viewed by 368 persons

Why cannot a chemical change be normally reversed ??

Dilution of sulphuric acid is exothermic or endothermic

Asked by admin @ in Chemistry viewed by 323 persons

Dilution of sulphuric acid its is exothermic or endothermic reaction

Design should not be changed based on iterations

Asked by admin @ in Computer Science viewed by 427 persons

Design should not be changed based on iterations

Understanding the chemical properties of acids and bases

Asked by admin @ in Science viewed by 322 persons

Write the chemical properties of acid and base

Condensation of steam is not a chemical change

Asked by admin @ in Chemistry viewed by 357 persons

Condensation of steam is not a chemical change.(true/false) ?​

What changes took place in varna based society

Asked by admin @ in History viewed by 324 persons

What changes took place in varna based society??

Which of the following is a chemical change

Asked by admin @ in Chemistry viewed by 309 persons

Which of the following is a chemical change? 1] Cutting of tree 2] Rusting of iron 3] Burning of candle 4] Water converting into steam ​

State the main difference between endothermic and exothermic reaction

Asked by admin @ in Chemistry viewed by 355 persons

Differentiate between exothermic and endothermic reactions. At least 3 differentiating points.

Most viewed questions in Chemistry

Discuss sn2 mechanism of methyl bromide using aqueous koh

Asked by admin @ in Chemistry viewed by 2187 persons

Comparing lactose percentage between whole milk and powdered milk

Asked by admin @ in Chemistry viewed by 1926 persons

Lewl letpa

Asked by maham237 @ in Chemistry viewed by 1563 persons

50 examples of unbalanced chemical equations with answers

Asked by admin @ in Chemistry viewed by 1394 persons

Chromium metal is immersed in an aqueous solution of cobalt(ii) chloride.

Asked by maham237 @ in Chemistry viewed by 1321 persons

Prepare a chart giving detailed information of carbon compounds

Asked by admin @ in Chemistry viewed by 1283 persons

Which 1 mole sample has the least entropy

Asked by maham237 @ in Chemistry viewed by 1271 persons

If you are given the assignment to cut raw poultry

Asked by maham237 @ in Chemistry viewed by 1250 persons

Effect of succinic acid on cst of phenol water system

Asked by admin @ in Chemistry viewed by 1248 persons

The reaction between aluminium powder and anhydrous barium nitrate

Asked by maham237 @ in Chemistry viewed by 1221 persons

Cnh4 lewis structure

Asked by maham237 @ in Chemistry viewed by 1143 persons

2 3 dihydroxypropanal

Asked by maham237 @ in Chemistry viewed by 1048 persons

Select true statements about the pentose phosphate pathway

Asked by maham237 @ in Chemistry viewed by 1034 persons

Crossword puzzle on carbon and its compounds class 10

Asked by admin @ in Chemistry viewed by 1008 persons

Ionic bond calculator

Asked by maham237 @ in Chemistry viewed by 984 persons