## How do you calculate the half life of a first order reaction?

First order

1. Half life = 0.693 / k.
2. Rate of the reaction = k * A.

## What are the differential equation of first order?

A first order differential equation is an equation of the form F(t,y,˙y)=0. A solution of a first order differential equation is a function f(t) that makes F(t,f(t),f′(t))=0 for every value of t. Here, F is a function of three variables which we label t, y, and ˙y.

What is first order reaction give two example of first order reaction?

First-order reactions are very common. We have already encountered two examples of first-order reactions: the hydrolysis of aspirin and the reaction of t-butyl bromide with water to give t-butanol. Another reaction that exhibits apparent first-order kinetics is the hydrolysis of the anticancer drug cisplatin.

### How many solutions does a first order differential equation have?

one solution
Solutions, Slope Fields, and Picard’s Theorem Finally we present Picard’s Theorem, which gives conditions under which first-order differential equations have exactly one solution.

### How do you find the order and degree of a differential equation example?

How To Find The Order Of Differential Equation And Its Degree?

1. Example (i): d3xdx3+3xdydx=ey.
2. Example (ii) : –(d2ydx2)4+dydx=3.
3. dydx+Py=Q.
4. Example: dydx+(x2+5)y=x5.
5. Example: d2ydx2+(x3+3x)y=9.
6. Example 1:- d4ydx4+(d2ydx2)2–3dydx+y=9.
7. Example 2: [d2ydx2+(dydx)2]4=k2(d3ydx3)2.
8. Example 3:- d2ydx2+cosd2ydx2=5x.

What is non linear differential equation of first order?

NONLINEAR FIRST-ORDER ODEs. • No general method of solution for 1st-order ODEs beyond linear case; rather, a variety of techniques that work on a case-by-case basis. Examples: i) Bring equation to separated-variables form, that is, y′ = α(x)/β(y); then equation can be integrated.

## What is the formula for calculating half life?

The formula for a half-life is T1/2 = ln(2) / λ. In this equation, T1/2 is the half-life. The ln(2) stands for the natural logarithm of two and can be estimated as 0.693, and the λ is the decay constant.

## How do you calculate half life?

The formula for half life calculations is: #t_(1/2)# is the half life of the substance. Half life is defined as the time after which half of a sample of a radioactive material will have decayed. In other words, if you start with 1 kg of material with a half life of 1 year, then after 1 year you will have 500g.

How do you calculate half life in chemistry?

How to calculate the half life Determine the initial amount of a substance. Determine the final amount of a substance – for instance, N(t) = 2.1 kg. Decide how long did it take for that much of material to decay. Input these values into our half life calculator. You can also check the result using the half life formula.

### How to measure half life?

Measuring half-life. A graph of the count rate of the source against time is plotted. From the graph, the time taken for the count rate to fall by half is measured. A number of measurements are made and an average value is calculated. The average value is the half-life of the radioactive source.