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polet [3.4K]
3 years ago
9

Which line (A or B) represents a faster speed?

Chemistry
1 answer:
BartSMP [9]3 years ago
3 0

Answer:

A

Explanation:

Because in 1 second, line A was faster than line B.

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What quantity of heat is required to raise the temperature of 460g of aluminum from 15C to 85C?
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Answer:

Q = 28.9 kJ

Explanation:

Given that,

Mass of Aluminium, m = 460 g

Initial temperature, T_i=15^{\circ} C

Final temperature, T_f=85^{\circ}

We know that the specific heat of Aluminium is 0.9 J/g°C. The heat required to raise the temperature is given by :

Q=mc\Delta T\\\\Q=mc(T_f-T_i)\\\\Q=460\ g\times 0.9\ J/g^{\circ} C\times (85-15)^{\circ} C\\\\Q=28980\ J\\\\\text{or}\\\\Q=28.9\ kJ

So, 28.9 kJ of heat is required to raise the temperature.

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