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STHS Chemistry
Cards to help pass the Chemistry Midterm at Sussex Technical High School.
| Question | Answer |
|---|---|
| On the Kelvin Scale, water freezes at 273°K and boils at 373°K. | True |
| Kinetic energy is related to molecular motion. | True |
| Because molecules in a solution are very close to each other, they always move in an organized, non-random fashion. | False |
| The fundamental SI unit of energy and heat is the calorie. | False |
| The Calories in foods actually means kilocalories. | True |
| The specific heat of water is lower than the specific heat of metals such as steel and silver. | False |
| If the pressure remains constant, the higher the temperature, the more likely the substance is to be in the gas phase rather than the liquid phase. | True |
| Water at 0°C can be found in the solid OR liquid phase. | True |
| Is heat absorbed or released when ice is melted? | Absorbed |
| Is heat absorbed or released when water is condensed? | Released |
| A _____________ is an instrument that uses the expansion of liquid alcohol to measure the temperature. | Thermometer |
| ________________ refers to the erratic and random movement of particles in water due to constant collision of molecules. | Brownian Motion |
| ____________ is the energy of motion. | Kinetic Energy |
| The temperature at which the Kelvin scale starts is called _____________. | Absolute Zero |
| A ______________ is a type of electronic sensor that uses a combination of two metals to measure temperature. | Thermocouple |
| ___________________ is reached when the temperature difference between two systems is zero. | Thermal Equilibrium |
| In any investigation, it is important to identify the relevant objects and effects involved in that investigation, which altogether constitute the ____________. | System |
| According to the ____________ of thermodynamics, the energy lost by a system must be gained by the surrounding or another system. | First Law |
| According to the ______________ of thermodynamics, heat cannot be transferred from lower temperature to higher temperature. | Second Law |
| Iron is considered a good __________ because it easily allows heat to flow across. | Conductor |
| _______________ refers to the phase change from gas to liquid. | Condensation |
| The amount of heat required to change one gram of a material from a liquid to a gas is called the ______________________. | Heat of Vaporization |
| The thermal energy that is absorbed or released by a phase change is called ____________. | Latent Heat |
| The temperature at which the air is saturated with liquid is called the ____________. | Dew Point |
| The ___________ of water is 100°C or 212°F. | Boiling Point |
| A 60% by weight solution of glycerol in water freezes at -28.5°F. Convert this to degrees Celsius. | -33.6°C |
| Convert 45°C to degrees Fahrenheit. | 113°F |
| Convert 300°K to degrees Celsius. | 27°C |
| Convert 298°F to degrees Kelvin. | 421°K |
| A 5 gram piece of gold changes temperature from 35°C to 78°C. How much heat does the gold absorb? | 27.7 J |
| If 925 J of heat was absorbed by a block of iron that weighs 43 grams, calculate the temperature change. | 48.9°C |
| One beaker contains 135 grams of water at 21°C and a second beaker contains 82.5 grams of water at 89°C. What is the final temperature of the water, after the beakers are mixed? | 46.8°C |
| What quantity of heat is required to vaporize 110 grams of toluene at its boiling point? | 45.3 Kj |
| The heat energy required to melt one gram of ice at 0°C is 335 J. If one ice cube has a mass of 45 grams, and you have 16 ice cubes, what quantity of energy is required to melt all of the ice cubes to form liquid water at 0°C? | 241,200 J |
| Convert -15°C to Kelvin. | 258°K |
| Convert 298°K to degrees Fahrenheit. | 77°F |
Created by:
N8Dawg
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