Specific Heat Capacity

What is the purpose of having water in the hole for the thermometer?

• To prevent air gaps between the metal and the thermometer.
• To increase the accuracy of temperature readings.
• To cool down the metal block.
• To create a barrier between the heater and the block.

How long should the temperature be recorded?

• Every minute for 10 minutes.
• Every minute for 5 minutes.
• Every 10 seconds for 1 minute.
• Every 5 seconds for 5 minutes.

What is the equation for specific heat capacity?

• Energy (or heat transferred) = mass × SHC × temperature change
• SHC = energy ÷ (mass × temperature change)
• Energy = mass × SHC ÷ temperature change
• SHC = energy × (mass ÷ temperature change)

How can power be measured accurately?

• Using a dual meter to count flashes in a certain time period.
• Using a voltmeter and an ammeter to measure current and voltage.
• Using a stopwatch to measure the time it takes to heat up the block.
• Using a balance to measure the mass of the block.

What is the unit for specific heat capacity?

• Joules per kilogram per degree Celsius.
• Watts per second.
• Kilograms per degree Celsius.
• Joules per second.

What is the correct equation for power?

• Power = current × voltage.
• Power = energy ÷ time.
• Power = mass × temperature change.
• Power = SHC × time.

What should be ignored when measuring power using a voltmeter and an ammeter?

• The voltage shown on the powerpack.
• The current flowing through the heater.
• The potential difference (PD) or voltage.
• The accuracy of the voltmeter reading.

What is the correct value of power in the experiment?

• 34.7 watts (W).
• 63 joules per second.
• 1900 joules in 30 seconds.
• 10 volts.

What should be plotted on the y-axis of the graph?

• Temperature.
• Time.
• Energy.
• Power.

How can specific heat capacity be calculated using the graph?

• SHC = (power × time) ÷ (mass × temperature change).
• SHC = (time ÷ temperature change) × (power ÷ mass).
• SHC = (energy ÷ mass) × temperature change.
• SHC = (mass × temperature change) ÷ power.