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olasank [31]
3 years ago
10

A piece of metal weighing 57.3 g is heated to a temperature of 88.0°C and is then immersed in 155 g of water at a temperature of

21.53°C. After equilibration the temperature is 24.72°C. If CH2O = 4.184 J/g°C, what is Cmetal?
A) .370 J/g°C

B) .164 J/g°C

C) 1.00 J/g°C

D) 2.11 J/g°C

E) .571 J/g°C
Chemistry
2 answers:
Taya2010 [7]3 years ago
8 0

The answer is E. You must use the formula q=mCDeltaT to solve this equation. You must also use the formula that q(reaction)=q(solution) to solve this problem

Ira Lisetskai [31]3 years ago
4 0

Answer:

The specific heat capacity of the metal piece is 0.571J/g^oC.

Explanation:

The heat given by the hot body(metal pace) is equal to the heat taken by the cold body(water).

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 metal = ?

c_2 = specific heat of water = 4.184 J/g^oC

m_1 = mass of metal = 57.3 g

m_2 = mass of water = 155 g

T_f = final temperature of water = 24.72^oC

T_1 = initial temperature of metal = 88^oC

T_2 = initial temperature of water = 21.53^oC

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

57.3g\times c_1\times (24.5-88.0)^oC=-155g\times 4.184J/g^oC\times (24.72-21.53)^oC

c_1=0.571 J/g^oC

The specific heat capacity of the metal piece is 0.571J/g^oC.

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the chloride of a metal M contains 47.25% of metal 1.0 gram of metal would be displaced from a compound by 0.88 gram of another
GenaCL600 [577]

Answer:

The equivalent weight of M is approximately 31.8 g

The equivalent weight of N is approximately 27.98 g

Explanation:

The given parameters are;

The percentage of the the metal M in in the chloride = 47.25%

Where by the chemical formula for the metal chloride is MClₓ, we have;

47.25% of the mass of MClₓ = Mass of M = W

Therefore, we have;

\dfrac{0.4725}{W} = \dfrac{1}{W + 35.5 \cdot x}

0.4725 × (W +  35.5·x) = W

0.4725·W + 0.4725×35.5×x = W

W - 0.4725·W  = 16.77·x

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W/x = 16.77/0.5275 = 31.799 = The equivalent weight of M

The equivalent weight of M = 31.799 ≈ 31.8 g

Given that 1 gram of M is displaced by 0.88 gram of N, then the equivalent weight of N that will displace 31.799 = 0.88 × 31.799 ≈ 27.98 g

The equivalent weight of N = 27.98 g.

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