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Lera25 [3.4K]
3 years ago
12

An 80.0-gram sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and its

internal energy increased by 7845 J.
What is the specific heat of the gas?
Chemistry
1 answer:
Oksana_A [137]3 years ago
8 0
Applying 1st law of thermodynamics:
Q = Delta U + WB 
WB is the workdone by the system
<span>WB = 346 J </span>
As,
<span>Delta U = ( m ) ( CV ) ( T2 - T1 ) </span>

<span>CV = ( Delta U ) / ( m ) ( T2 - T1 ) 
</span>Putting the values in equation:

<span>CV = ( 8485 J ) / ( 80.0 g ) ( 225 C - 25 C ) </span>

<span>CV = 0.5303 J / g - C degree </span>
Now putting in original equation:
<span>Q = Delta U + WB </span>

<span>Q = ( 8485 ) + ( 346 ) = 8831 J
8831J is the specific heat of the gas</span>
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