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Mkey [24]
3 years ago
9

Which of the following is a correctly written chemical equation that demonstrates the conservation of mass?

Chemistry
1 answer:
wlad13 [49]3 years ago
6 0

if I'm not mistaking it would be the second option

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A 1000g Ni rod, heated to 150. °C was placed in 1.00 kg of water at 25.0 °C. The final temperature of the water was 26.3 °C. Wha
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Answer : The molar specific heat of Ni is, 2.576J/mole^oC

Explanation :

In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.

q_1=-q_2

m_1\times c_1\times (T_f-T_1)=-m_2\times c_2\times (T_f-T_2)

where,

c_1 = specific heat of Ni = ?

c_1 = specific heat of water = 4.18J/g^oC

m_1 = mass of Ni = 1000 g

m_2 = mass of water = 1 kg = 1000 g

T_f = final temperature of water = 26.3^oC

T_1 = initial temperature of Ni = 150^oC

T_2 = initial temperature of water = 25^oC

Now put all the given values in the above formula, we get

1000g\times c_1\times (26.3-150)^oC=-1000g\times 4.18J/g^oC\times (26.3-25)^oC

c_1=0.0439J/g^oC

Now we have to calculate the molar specific heat of Ni.

\text{Molar specific heat of Ni}=\text{Specific heat of Ni}\times \text{Molar mass of Ni}=(0.0439J/g^oC)\times (58.69g/mole)=2.576J/mole^oC

Therefore, the molar specific heat of Ni is, 2.576J/mole^oC

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