Chemistry- Thermochemistry

Front

What is the heat required to raise the temperature of WATER 1°C?

Back

calorie

Front

What is the specific heat of copper if a 24.0 gram sample is heated from 25.0°C to 500.0°C and absorbs 4378 J of heat?

Back

0.384 J/g°C

Front

Define thermochemistry.

Back

Study of heat changes that occur during a chemical reaction & physical changes of state.

Front

If a sample of iron receives 50 J of heat energy that raises its temperature by 25.0°C and has a specific heat of 0.10 J/g°C, what is the mass of the iron sample?

Back

20g

Front

For an exothermic reaction, what is the sign of ΔH?

Back

negative

Front

What is specific heat?

Back

The amount of heat required to raise the temperature of 1 gram of a substance by 1°C.

Front

What is the formula for calculating heat energy (q)?

Back

q = m * c * ΔT, where m is mass, c is specific heat, and ΔT is the change in temperature.

Front

What does it mean if a reaction is endothermic?

Back

It absorbs heat from the surroundings, resulting in a positive ΔH.

Front

What is the specific heat of water?

Back

4.18 J/g°C.

Front

What is the relationship between heat and temperature change?

Back

Heat is directly proportional to the temperature change of a substance.