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3 years ago

How is thermal energy transferred between two objects that are at different temperatures?

Chemistry

1 answer:

qwelly [4]3 years ago

8 0

Answer:

heat flows from the object that has more thermal more energy to the object with less thermal energy

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A hot-air balloon is filled with air to a volume of 3000 m3 at 750 torr and 21°C. The air in the balloon is then heated to 60.°C

valina [46]

Answer: 1.47

Explanation:

The combined gas equation when pressure is constant:

$\frac{V_1}{n_1T_1}=\frac{V_2}{n_2T_2}$

where,

$n_1$ =original number of moles of air in the balloon = ?

$n_2$ = number of moles of air in the heated balloon = ?

$V_1$ = initial volume of gas = $3000m^3$

$V_2$ = final volume of gas = $5000m^3$

$T_1$ = initial temperature of gas = $21^oC=273+21=294K$

$T_2$ = final temperature of gas = $60^oC=273+60=333K$

Now put all the given values in the above equation, we get the final pressure of gas.

$\frac{3000}{n_1\times 294K}=\frac{5000}{n_2\times 333K}$

$\frac{n_2}{n_1}=1.47$

Therefore, the ratio of the number of moles of air in the heated balloon to the original number of moles of air in the balloon is 1.47

5 0

3 years ago

Describe the three ways heat can be transferred-radiation, conduction, and convection

hjlf

An example of radiation can be from a fire since the firs is letting off heat without contact. An example of convection can be boiling water since there are molecules moving in the water (a fluid). An example of conduction can be a tea spoon in a cup of hot tea, the heat is getting transferred froma hot object to a cool object.

8 0

4 years ago

Which property is true for metals?

Aleks04 [339]

They're malleable and have high melting and boiling points

8 0

3 years ago

Match the term with its description. (4 points)

zlopas [31]

Answer:

2B, 1A, 3D, 4C, because of the definitions, they match.

4 0