Answer:
- <u>1. The direction of heat flow is from your body to the pool or the air.</u>
<u />
- <u>2. You feel the pool feels cooler because your body temperature drops faster in the water than in the air, due to the higher specific heat capacity of water.</u>
Explanation:
The normal temperature of the body is about 98ºF.
<em><u>1. Heat direction</u></em>
The thermal energy always flows from the warmer bodies to the colder bodies. Thus, the heat from your body flows toward the air or the water.
heat flow
98ºF 80ºF
warmer colder
<u><em>2. Why the pool feels cooler than the air?</em></u>
Water has a high specific heat capacity. That makes that, for a given amount of heat, it will change its temperature little.
When your body is in water the heat of your body will flow to the water and while the themperature of the water changes little the temperature of your body changes more, in the same time. This is, the rate of cooling of your body is higher than the rate of cooling of the water.
When you compare what happens in air, since air has a lower specific heat capacity, the rate of cooling of your body is lower than in water.
Then, the temperature of your body will decrease faster in the water than in the air, which is what you interpret (feel) as the pool is cooler than the air.
Always remember that a compound can be separated into simpler substances by chemical methods/reactions. While elements cannot be broken down into simpler substances by chemical reactions. You can do a flame test and spectrum analysis to determine whether a solid material is an element or a compound. Check the boiling and/or melting point, color or density. Also check the solid material’s reaction with oxygen, hydrogen, calcium, or various acids. Examine and study its physical chemistry. The element(s) that may be present may be identified by checking the absorption edges from an x-ray spectrum.
For instance, a solid white material (A) is heated in the absence of air, decomposing to form a new white material (B) and gas (C). Gas (C) has the same properties as the products when carbon is burned in an excess of oxygen (CO2). How can we determine whether A, B, and C are elements or compounds? A would be a compound since it was broken down into B and C. So how do we determine B and C?
A compound can be decomposed, for the reason that a compound is composed of 2 or more elements. On the contrary, an element cannot be decomposed.
Answer:
Chlorine would be the answer
Explanation:
Answer:
Explanation:
2 H₂S(g) +S0₂(g) = 3 S(s) + 2H₂0(g)
2 x 34 g 64 g 3 x 32 g
68 g of H₂S reacts with 64 g of S0₂
3.89 g of H₂S reacts with 64 x 3 .89 / 68 g of S0₂
3.89 g of H₂S reacts with 3.66 g of S0₂
S0₂ given is 4.11 g , so it is in excess .
Hence H₂S is limiting reagent .
68 g of H₂S reacts with S0₂ to give 96 g of Sulphur
3.89 g of H₂S reacts with S0₂ to give 96 x 3.89 / 68 g of Sulphur
3.89 g of H₂S reacts with S0₂ to give 96 x 3.89 / 68 g of Sulphur
5.49 g of Sulphur is produced .
Actual yield is 4.89
percentage yield = 4.89 x 100 / 5.49
= 89 % .
Answer:
rebar
is gridwork of steel rods
Explanation:
Reinforced concrete is one important component of skyscrapers. It consists of concrete (a mixture of water, cement powder, and aggregate consisting of gravel or sand) poured around a gridwork of steel rods (called rebar) that will strengthen the dried concrete against bending motion caused by the wind.