Describe processes are endothermic or exothermic, Chemistry

Assignment Help:

From personal experience, describe whether these processes are endothermic or exothermic. Give a reason for each.

      a. A charcoal briquette burns.

      b. Ice melts.

      c. Water evaporates from your skin.

      d. Wood burns.

Answer:

      a. Exothermic. A charcoal briquette releases heat as it burns.

      b. Endothermic. Water absorbs the heat essential for evaporation from your skin, and your skin feels cooler.

      c. Endothermic. Ice absorbs the essential heat from the environment to melt.

      d. Exothermic. Wood releases heat as it burns.


Related Discussions:- Describe processes are endothermic or exothermic

#titleplease help.., Ask question #Minimum 100 words accepted Is there a se...

Ask question #Minimum 100 words accepted Is there a sequential move from one to another, amongst law, theory, and a hypothesis? Describe controlled conditions to find a scientific

What are total variables and degrees of freedom of a system, What are total...

What are total variables and degrees of freedom of a system of two components, when the number of phases is one, two, three etc.?  Ans:  For two - component systems, degree of

Derive gibbs duhem equation, (a) Derive a relationship between the elevatio...

(a) Derive a relationship between the elevation in boiling point of a solution and the mole fraction of the solute from the thermodynamic consideration. (b) The molal elevatio

What are photochemical reactions, What are photochemical reactions? Ex...

What are photochemical reactions? Explain the mechanism of the photo- chemical reaction occurring among hydrogen and chlorine gas.

Calculate the temperature of that superheated steam, It is desired to creat...

It is desired to create 5 kg of superheated steam at 300 o C and 20 bar using an isobaric mixer. If 543 kJ of heat are sent to the system, and 2 kg of saturated steam is mixed wit

Explain heat of combustion, Explain heat of Combustion? Ans) The amount ...

Explain heat of Combustion? Ans) The amount of heat liberated when single mole of any substance is completely burnt in oxygen is known as heat of combustion H is negative for he

Atomic structure, what is the mass of a proton and electron

what is the mass of a proton and electron

Haloform reactions, what is the chemistry behind haloform reactions?

what is the chemistry behind haloform reactions?

Determine the height difference, Approximate the torque and power necessary...

Approximate the torque and power necessary to rotate the inner 20 cm diameter cylinder shown in Figure 1. SAE 10W-30 oil at 20°C fills the gap. Assume a linear velocity profile.

Atomic absorption, why is AAS used to determine lead content in soil

why is AAS used to determine lead content in soil

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd