# Chemistry

posted by .

How would I calculate these? I have the answers because there from a previous test.

1) How much heat is required to raise the temperature of a 5.52-g sample of iron ( specific heat = 0.450 J/g C) from 25.0 degrees C to 79.8 degrees C?

2) You mix 60. mL of 1.00 M silver nitrate with 25 mL of 1.63 M sodium chloride. What mass of silver chloride should you form?

• Chemistry -

1)
a = mass Fe x specific heat Fe x (Tfinal-Tinitial)

2)
This is a limiting reagent problem. I know that because amounts are given for BOTH reactants.
AgNO3 + NaCl ==> AgCl(s) + NaNO3
mols AgNO3 = M x L = ?
mols NaCl = M x L = ?

Using the coefficients in the balanced equation, convert mols AgNO3 to mols AgCl.
Do the same to convert mols NaCl to mols AgCl.
It is likely that these two values will not be the same which means one of them is wrong; the correct answer in limiting reagent problems is ALWAYS the smaller value and the reagent producing that value is the limiting reagent.
Use the smaller value and convert to grams. g AgCl = mols AgCl x molar mass AgCl.

## Similar Questions

1. ### Lauren

The amount of heat required to raise temperature of 55.85 g of iron 1 degrees C is called its A. Change of energy B. Enthalpy C. Molar heat capacity D. Specific heat capacity E. Specific Heat.
2. ### Chemistry

Calculate the amount of heat (in calories) required to raise the temperature of 200g of water from 20C to 50C. The specific heat of water is 1.00 cal/g. I have done other spacific heat problems but on this one i don't know how to start...

5. ### chemistry

The specific heat of iron is approximately 0.45 J/g °C. How much heat energy is required to raise a 40 g sample of aluminum from 40 °C to 60 °C?
6. ### Physics

How much heat is required to raise the temperature of a 4.3-kg block of steel by 48 K?
7. ### chemistry

calculate the heat energy required to raise the temperature of a 500. gram iron pipe from 25 degress celcius to 100 degrees celcius. the specific heat for iron is .45 J/g degrees celcius
8. ### Chemistry

If we heat a 10 g sample of gold and a 10 g sample of iron with 50 kJ of energy each, which will have the greatest change in temperature?
9. ### Phsyics

How much heat is required to raise the temperature of a 4.1-kg block of steel by 64 K?
10. ### Chemistry

How much heat is needed to raise the temperature of 5.58 kilograms of iron from 20.0°C to 1000.0°C?

More Similar Questions