Which of the following is an example of convection?
a a hot object transferring heat to a cooler one
b the rays of the sun warming the earth
c a hot oven warming the air around it
d hot air rising and cooler air falling
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Ответ:
A is example of radiation or conduction (i don't sure)
B is example of radiation
C is example of conduction
D is example of convection
Ответ:
The answer is D. hot air rising, cool air falling
Ответ:
The thermal energy released per gram is 19.2 kJ/g.
(3) is correct option.
Explanation:
Given that,
Weight of hydrocarbon = 2.50 g
Heat capacity
We need to calculate the thermal energy released
Using formula of thermal energy
Heat released =heat absorb by calorimeter+heat absorb by water
Put the value into the formula
Now, The thermal energy released per gram
Put the value into the formula
Hence, The thermal energy released per gram is 19.2 kJ/g.