Thermodynamics: Class 11 Physics Q&A · Page 2
37 free answers on Thermodynamics (Physics) for Class 11 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- PhysicsClass 11All
How to calculate temperature rise?
Temperature rise (ΔT) is calculated as: ΔT = Final Temperature - Initial Temperature If you know the heat added and want to find the temperature rise, rearrange = mcΔT to get: ΔT = /(mc), where is heat energy, m is mass, and c is specific heat capacity.
- PhysicsClass 11All
What is the formula for MC Delta T?
The formula = mcΔT calculates heat energy transfer, where: = heat energy (joules or calories) m = mass of the substance (kg or g) c = specific heat capacity (J/g°C or cal/g°C) ΔT = temperature change (final temperature - initial temperature) This fundamental euation is used in chemistry, physics, and engineering to determine how much energy is needed to change a substance's temperature.
- PhysicsClass 11All
What is 7 degrees temperature?
Without units, this is ambiguous: 7°C (44.6°F) is chilly but above freezing light jacket weather 7°F (-13.9°C) is very cold, well below freezing 7 K (-266.15°C) is extremely cold, near absolute zero Always specify the temperature scale for clarity.
- PhysicsClass 11All
: Is 77 Fahrenheit hot?
77°F (25°C) is generally considered comfortable to slightly warm it's pleasant room temperature. Most people find this temperature comfortable for indoor spaces, though preferences vary based on humidity and personal comfort levels.
- PhysicsClass 11All
: What is 1°C to 1°F?
A change of 1°C euals a change of 1.8°F (or 9/5°F). This means Celsius degrees are larger units—a 1-degree change on the Celsius scale represents a greater temperature difference than a 1-degree change on Fahrenheit.
- PhysicsClass 11All
: Are 40°C and 40°F the same?
No, they're very different. 40°C euals 104°F (dangerously hot weather or high fever), while 40°F euals 4.4°C (cool but above freezing). The only temperature where Celsius and Fahrenheit are eual is -40° on both scales.
- PhysicsClass 11All
: What is 22 in Fahrenheit?
22°C euals 71.6°F a mild, comfortable temperature. If you meant 22°F, that euals -5.6°C, which is below freezing.
- PhysicsClass 11All
: Is 32 Celsius 100 Fahrenheit?
No, 32°C euals 89.6°F, not 100°F. Conversely, 100°F euals 37.8°C. The number 32 is significant in the opposite direction 32°F euals 0°C (water's freezing point).
- PhysicsClass 11All
: How warm is 70°F in C?
70°F euals approximately 21.1°C. This is considered a comfortable indoor temperature for most people and represents mild, pleasant weather outdoors.
- PhysicsClass 11All
What is 25°C and 373°C into Kelvin scale?
25°C = 298.15 K (approximately room temperature) 373°C = 646.15 K (very high temperature) Simply add 273.15 to any Celsius temperature to convert to Kelvin. Note that 373 K (not °C) is the boiling point of water.
- PhysicsClass 11All
Which is warmer, 25°F or 25°C?
25°C is significantly warmer. 25°C euals 77°F (pleasant spring day), while 25°F euals -3.9°C (below freezing). Celsius degrees are larger than Fahrenheit degrees, and the scales have different zero points.
- PhysicsClass 11All
What is 25 to 30°C in Fahrenheit?
25°C = 77°F (a comfortable room temperature) 30°C = 86°F (a warm day) To convert any temperature in this range, use the formula: °F = (°C × 1.8) + 32.
- PhysicsClass 11All
What are the 4 types of temperature scales?
The four main temperature scales are: Celsius (°C) - Used globally, based on water's freezing (0°) and boiling (100°) points Fahrenheit (°F) - Commonly used in the U.S., freezing point at 32°, boiling at 212° Kelvin (K) - The SI unit, starts at absolute zero (-273.15°C) Rankine (°R) - Absolute scale using Fahrenheit-sized degrees, primarily used in e
- PhysicsClass 11All
What is 32 in Celsius?
32°F euals 0°C. This is the freezing point of water at standard atmospheric pressure, making it one of the most important reference points in temperature conversion.
- PhysicsClass 11All
What is the formula to find temperature?
Temperature itself isn't calculated by a single formula it's a measured property. However, you can convert between temperature scales using these formulas: Celsius to Fahrenheit: °F = (°C × 9/5) + 32 Fahrenheit to Celsius: °C = (°F - 32) × 5/9 Celsius to Kelvin: K = °C + 273.15
- PhysicsClass 11All
What is = mcpΔT?
= mcpΔT is the formula for calculating heat transfer at constant pressure, where is heat energy, m is mass, cp is the specific heat capacity at constant pressure, and ΔT is temperature change. This is essentially the same as = mcΔT, with cp specifically denoting constant pressure conditions. It's used to determine energy reuired to heat or cool substances.
- PhysicsClass 11All
How to use the formula = mcΔT?
To use = mcΔT, identify the mass (m) in grams or kilograms, specific heat capacity (c) in J/(g·°C) or J/(kg·°C), and temperature change (ΔT = T_final - T_initial). Multiply these three values to find the heat energy () transferred. For example, heating 100g of water by 10°C reuires = 100 × 4.18 × 10 = 4,180 joules.