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3 years ago

The specific heat of ice is 0.5 calories/gram.

Chemistry

1 answer:

dsp733 years ago

4 0

Answer:

Q = 30 calories

Explanation:

We have,

The specific heat of ice is 0.5 calories/gram.

The heat require to raise the temperature is given by :

$Q=mc\Delta T$

m = 60 grams, c = 0.5 calories/gram °C, $\Delta T=1\ C$

So,

$Q=60\times 0.5\times 1\\\\Q=30\ \text{calories}$

So, 30 calories of heat is required to raise the temperature by 1 C.

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Answer:

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A gas at constant volume has a pressure of 4. 50 atm at 200. K. What will be the pressure of the gas at 250. K? 3. 60 atm 4. 60

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5.625 atm will be the pressure of the gas at 250 K temperature of the gas at constant volume.

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Pressure of the gas will be calculated by using the ideal gas equation as:

PV = nRT,

From the question, it is clear that:

Moles of the gas and volume is constant here, so we calculate the pressure by rearranging the above equation as:

P/T = nR/V

And required equation will be:

P₁/T₁ = P₂/T₂, where

P₁ = pressure of gas = 4.50 atm

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T₂ = temperature of gas = 250 K

On putting all these values in the above equation, we get

P₂ = 4.50 × 250 / 200 = 5.625 atm

Hence, 5.625 atm is the pressure of the gas.

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3 years ago

Water is produced from the reaction of hydrogen and oxygen gas, according to the equation below. What is the excess reactant in

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Explanation:

Mole ratio of Oxygen to Hydrogen gas = 1 : 2.

If we use 3.0 moles of oxygen gas, we would need 3.0 * 2 = 6.0 mol of hydrogen gas.

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3 years ago

A sample of 2.45g aluminum oxide decomposes into 1.3g of aluminum and 1.15g of oxygen. What is the percentage composition of the

Vitek1552 [10]

Answer:

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Explanation:

If we know the grams of a chemical compound in a specific reaction, it is possible to know the percentage of each atom that composes it.

For the Aluminum Oxide in this problem, we know its total weight and the grams of each component.

therefore we can determine the percentage ratio of its components through:

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3 years ago

What type of reaction is illustrated below?2H1 --> H2 + 12

Artyom0805 [142]

Answer:

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3 years ago