Chemistry

To raise the temperature of 5 kg of water from 20 0C to 30 0C, a 2-kg iron bar is heated and then dropped into the water. What should the temperature of the bar be (ciron = 0.46 kJ/kg 0C)

1. 👍
2. 👎
3. 👁
1. heat lost by iron + heat gained by water = 0.
[mass Fe x specific heat Fe x (Tfinal-Tinitial)] + [mass H2O x specific heat water x (Tfinal-Tinitial)] = 0
just one unknown,

1. 👍
2. 👎

Similar Questions

1. Chemistry

1) What Physical properties, other than specific heat, could you use to help identify unknown metals? 2) Why is water an excellent material to use in a calorimeter? Density, color, resistivity (or conductitivy), melting point,

2. Physics Hear

1) Peter is heating water on the stove to boil eggs for a picnic. How much heat is required to raise the temperature of his 10.0-kg vat of water from 20.0℃ to 100.0℃? Formula>> Q=mTcp 2)Under the spreading chestnut tree of the

3. Physics - calorie

This was my problem: 4.) The specific heat capacity of copper is 0.092 cal/g*oC. Show that the amount of heat needed to raise the temperature of a 10-g piece of copper from 0oC to 100oC is 92 cal. How does this compare with the

4. Chemistry

Approximately how many joules of heat are needed to raise the temperature of a 4.0-gram sample of water to 8.0C?

1. Chemistry

How many joules are required to raise the temperature of 450mL of water from 30 °C to 100 °C? The specific heat of copper metal is 0.385 J/ g- K. How many KJ of heat needed to raise the temperature of 1.1 kg block of copper from

2. science

How much heat in kcal must be added to 0.32 kg of water at room temperature (20°C) to raise its temperature to 36°C?

3. chemistry

The number of kilojoules needed to raise the temperature of 125 g of water from 20°C to 95°C is ________. The specific heat of water is 4.184 J/g °C.

4. chemistry

A) How much energy is released when 25.0 g of steam condense to liquid H2O at 100°C? B) If it takes 1215J of heat to raise the temperature of water 11.C, how much does the water weigh, in grams? C) How many joules of heat does it

1. Chemistry

How many joules of heat are required to raise the temperature of 550 g of water from 12°C to 18°C

2. chemistry

(a) A person drinks four glasses of cold water (3.0°C) every day. The volume of each glass is 2.5x10^2 mL. How much heat (in kJ) does the body have to supply to raise the temperature of the water to 37°C, the body temperature?

3. chemistry

How many joules of heat energy are required to raise the temperature of 20 grams of water by 50°C?

4. Physics

How long would it take a kettle with a 1kW heating element to heat 1 litre of water? Watts = Joules / second • Mass of 1 litre of water = 1kg • 1 kW = 1 k Joule / second or 1000 joules/ second • 1g of water needs 4.184J to